Here is a link to a downloadable PDF file with a list of the rubber, resins and waxes I use in my videos: www.dropbox.com/s/kz6mhmf7v5vpy7l/Material%20and%20Suppliers.pdf?dl=0

@jonduffin7560

3 жыл бұрын

Hi Robert, just subscribed! Wanted to give casting a go one day and your videos look great!

@elektronstorm

3 жыл бұрын

Hi Robert, i am wondering why don't you use acetone? With acetone you don't need pressure pot or vacuum and there is no bubbles.

@RobertTolone

3 жыл бұрын

@@elektronstorm How do you use the acetone in the process?

@elektronstorm

3 жыл бұрын

@@RobertTolone Before pouring the resin, put a little acetone in the mold(max 2mm in height) and slowly pour the resin in to the mold. Since acetone's density lighter than resin, acetone flow above the resin and prevents any air trapped in mold. You must overflow the mold with resin to get rid of all the acetone. If you don't acetone will dissolve the resin. Note that with this method, resin's curing time is a bit longer. If you have any questions, i can record and send you a video.

@RobertTolone

3 жыл бұрын

@@elektronstorm I have never heard of this method before and will test it out. Thanks!

Robert, I'm a professional designer (visual and product) and im completely blown away at the amount of knowledge you share with us. This is literally the knowledge that i paid tens of thousands of dollars for in college, and with your videos i have the ability to watch them over and over. Its incredible. Your videos are a gift for us makers.

@RobertTolone

Жыл бұрын

I went to Art Center. If KZread had existed then I might not have gone!

@garyedwards3269

Жыл бұрын

Theoretically... We should put the finest teachers and college professors...as well as private sector professionals...on DVD and market an ivy league education to anyone on any subject able to afford a DVD box set. The exception would be doctors, dentists, martial artists, etc...any subject that requires a real world internship in addition to the basic studies in order to complete the educational experience SAFELY. Other than that, colleges and trade schools should be primarily for advanced research and rigorous testing of graduate hopefuls (sans politics or religion). This marketable alteration of the educational process became available with the advent of videotape and DVD technology but has only been lightly used by the ivory towers...(probably due to proprietary restrictions designed to reserve finer education for the wealthy few). I've enjoyed many philosophy classes for free on KZread along with classes on legal education, chemistry, astronomy, auto repair, etc. But it makes me sad to think of the many great teachers who might've been immortalized digitally who never got the chance due to profit-based restrictions on intellectual property. The main promise of the computer and internet age was wider information sharing...but how well has it been realized? I remember watching an educational Disney film in grade school called 'Donald Duck in Mathmagic Land' and wondering at the time why all early education wasn't presented in this Hollywood type format? Skip the boring teachers! Like Mickey Rooney said... "Let's put on a show!"

@slippy_paws926

Жыл бұрын

Man seriously, im getting into toy making and everyday i learn something new. Its so cool that you do this for us

I just started watching your videos and I have to say you are not only very knowledgeable and helpful but also I love your demeanor - you’re seem friendly and of a good humor. Thanks for what you do

Speaking of bubbles, how about a video on your methods for filling bubble holes?

@RobertTolone

3 жыл бұрын

I will do one, or include bubble repair as part of a video. Thanks for the suggestion.

Huge fan of your videos Robert, but this one was exceptional. Seeing the problems that even a veteran like yourself has to overcome makes me feel like maybe I'm not such an idiot after all. Thanks so much for sharing :)

You talked a lot about "filling in the bubbles"... can you show us how to do that?!?!?

You forgot the most important step of using the displacement method of determining volume: running down the street naked, screaming "Eureka!"

Amazing videos. Never cast a single thing but feeling confident enough to start . Thank you Sir.

Watching you make those airfoil shaped side plates has me wanting to make a cardboard aeroplane! Great demo!

I used to make small runs of dice and had some of these issues. Bubbles are a plague! I finally found a solution that works for me. Precise volume measuring and non-bubble mixing can be done with syringes. Cups not so much. A pair of 60cc syringes can be bought at your local Tap Plastic or similar for under $10. To get your quarter cup, with no bubbles, you'd draw 30cc of A into one, 30cc of B into the other. To mix them with no bubbles use a tiny piece of plastic tubing that fits on their tapered noses. Put it on one of the syringes, push the contents out to completely filll the tube, and then stick the nose of the other syringe into the tube. After that you can push them back and forth from one syringe to the other through the tubing. They get thoroughly mixed with no bubbles. Then comes pouring. In both mold making and resin injection for the piece, using a tube (or "anti-sprue") and injecting all the way at the bottom is the winning move. Cavities in the piece can still catch air bubbles, but at least you're not pushing them in or covering them deeper when you pour.

I like how you said “we’re not making cabinetry” in cabinetry we often say “it’s fine, we’re not making pianos” haha

@RobertTolone

Жыл бұрын

The piano makers probably say, “Oh well, we’re not making a Stradivarius!”

@TheNostalgicBasement

Жыл бұрын

@@RobertTolone i cannot fathom what the fiddle makers say! Haha

As a guy who recently started trying to make resin dice without a pressure pot, it's nice to see a professional struggles with all the same issues I've been dealing with too.

@glasshalffull2930

Жыл бұрын

From the cement kitchen countertop industry, they attach a palm sander to the forms to help vibrate out the bubbles. We were plastic casting 2 foot diameter seals for our company and solved our bubble problem with the palm sander solution.

@RobPaige

Жыл бұрын

@@glasshalffull2930 That is a damned good idea. Thanks!

When I was resin casting GI Joe parts, I would actually use a syringe plunger with a blunt needle. I would load it with resin, push the blunt needle down into the mold and inject the resin. I would keep injecting until it overflowed from the vent hole. This helped rinse out the air bubbles!

Pressure pot makes high pressure micro bubbles in cured casting. Vacuum degassing causes low pressure bubbles to expand and rise to top quicker in resin. Big difference !

When I saw you illustrating pouring into both feet I was a little concerned that second foot wouldn’t be used as an air vent silly me 😂

It brings me joy seeing you set these challenges and achieving them! Great video, super good as a new starter as I am.

Great work Robert you didn’t Duck the issue of trying to get a perfect cast. I share your frustration at not having the preferred tools at your disposal. Looking forward to your next challenge.

You are such an inspiration for me just to keep doing and experimenting. Thank you so much !

@RobertTolone

3 жыл бұрын

Thanks Muhammad!

I always used the Archimedes “Eureka!’ method like you demonstrate here, for all my resin castings since the 80s! Love hearing you do too.

@RobPaige

Жыл бұрын

Yeah, I was sitting here watching this, having flash backs to my physics 1 class, and BAM!

that is what i found out when i tried to do this type of castings, thank you for the advice now i can start over and do a better job at casting .

Four or five years ago I dabbled into casting and had really bad failure and threw my hands in the air and walked away but after watching this video I know what I did wrong I had a wet mold thank you for that now I have to look into this again thank you for that too LOL

Love your videos, you're really great at explaining and funny too! May have to try mold making at some point! 😊

@RobertTolone

3 жыл бұрын

Do it, it’s fun!

This was a great set of videos! Very informative, I've learned so much :-)

You are the reason I began wanting to learn resin making I would like to tell you you inspire me

Another very good video! Thanksba lot! Can't wait to make my own cast!

Still very much appreciating your tips and hints as well as your presentation! Thanks again!

great fun to watch, thank you for shareing

@RobertTolone

3 жыл бұрын

Thanks for watching Wolli!

Thank you so much for this video. I started molding and casting middle of last year. I dont have any special tools so this video was great. The tip about brushing the resin into the mold worked perfectly , no bubbles! Thanks again

This would have been an excellent entry into an Engineering build competition. It is no wonder that you are such an accomplished casting/moulding professional. Nice work Rob. Very great quality work.

Truly excellent videos. Have helped me a lot. Thank you so much

Excellent thanks for the great video, learnt a ton

So clear example. Excelent good! Thanks!

@RobertTolone

3 жыл бұрын

Thanks for watching!

Since we made monument sized bronze sculptures my mind is now churning with ways we could have reduce the chasing time from what I’ve learned here

@RobertTolone

Жыл бұрын

So much labor in finishing bronze casts!

Amazing tips and tricks! Learning so much on your channel! Thank you

@RobertTolone

3 жыл бұрын

Thanks Claude!

Good advice and taught in a visual way, thank you.

@RobertTolone

3 жыл бұрын

Thank you Marc, I appreciate your comment.

Great video! Really helpful for some one who has no equipment.

Excellent Video

You are so lovely, informative and helpful! love your videos

I REALLYN needed to find this channel!!!

@RobertTolone

3 жыл бұрын

Glad you’re here Camrin!

I found your channel yesterday and really love your videos Robert. Great camera work and sound and the instruction is so informative. Just what I need right now. Thank you!

@RobertTolone

3 жыл бұрын

Glad you find my videos useful!

I absolutely adore your videos, very informative and helpful without all the unnecessary commentary. I began to lose patience when I began searching for educational videos for some artwork I have been working on. Luckily, I found your channel here... though I couldn't help but crave a grilled cheese everytime you said "hot melt". ☺️ Your opinion of hot glue from the 1st part of these videos has me looking into beeswax. Thanks again for all of your helpful videos. They're the perfect length! I never feel like you're going too slow for my patience or too fast for my learning capabilities. I will continue to share with others.

@RobertTolone

2 жыл бұрын

That’s for watching and sharing the videos! I really appreciate it.

Your videos are frigging lovely. I'm so glad a friend pointed me in your direction, I can already tell you're saving me a lot of growing pains in resin casting.

@RobertTolone

3 жыл бұрын

Thanks Trash! I love word combinations and “frigging lovely” is fantastic! It’s one of those context-sensitive phrases that can be either an insult or a complement. Listen for it, you’ll hear it in upcoming videos.

Your so cute! Keep making these beginner detailed videos! Very helpful!

@RobertTolone

3 жыл бұрын

Thanks Kayla! It’s very kind of you to say so although I am almost never accused of being cute! 😄😄❤️

Thank you for saving me $!! I’m ordering a pressure pot right now for my mold making and resin final products project!

I have a project where I have to cast about 100 large, translucent crochet hooks. I know that sounds relatively easy, but there are other requirements that make this difficult if not impossible. The crochet hooks are for my friend who teaches crafts to (I hope I use the right term here) challenged kids. The hooks need to be large in size, clear or translucent, WITH glitter evenly spread through the resin. And to make it worse, even though the hooks are large, they need to be light for easy handling, which means they need to be hollow or filled with some kind of material that will make them lighter than a solid resin hook would be (but still be strong enough to not easily break or shatter when dropped.) I made a silicone mold, added about 60% of the mold volume with clear resin (with glitter) and then tried rotocasting the mold. This meant no pressure pot, but since the hooks can be "translucent," I was less worried about small bubbles. But the results were very uneven and I was having about a 60% fail rate. The resin would cure differently for each run, so that some hooks had more weight near the handle whereas others had more weight near the head. And the glitter would often clump up at one end rather than distribute evenly. So I have to figure out something else to try and get consistent results. If this sounds like an interesting challenge for one of your videos, I would be happy to send you the 3D printed hook model!

@RobertTolone

2 жыл бұрын

That’s a tough one David. Many times the disconnect between what you would like to make and what is possible to make is large. In your case, you have so many competing variables and complexities that I think the likelihood of success is exactly what you have experienced. The shape of a crochet hook is far from ideal for roto casting. Getting glitter to distribute evenly in a clear casting is difficult under ideal circumstances. It’s probably impossible when roto casting. You cannot control wall thickness in a roto cast and so you cannot make a reliably strong hook. I would solid cast them in a lightweight resin using a production mold with 10 cavities. After cleaning I would paint the castings in glitter spray paint. Quick and simple.

A Whopper!! Excellent!! Nice one

Thank you for sharing your experience and skills. I don't know how I stumbled over your page. And you do lots of things I don't think I will need to know... But it is addictive and I'm now looking at things thinking how would I cast that? It's great to learn and again thank you for sharing. FYI I'm in my 50s and just enjoying. 😁

Loved this video. Failure is the best teacher. Nice to see a pro like you, Robert, can still have difficulties. :)

@RobertTolone

3 жыл бұрын

Salvatore Attinello I often run into difficulties. They are unavoidable- at least for me! Thanks for your comment Salvatore.

Wish I could make all these .....really enjoying watching a craftsman at work ....your so informative and fun to watch ....

@RobertTolone

3 жыл бұрын

Thanks Wendy!

thanx for your video i learn a lot

@RobertTolone

3 жыл бұрын

thanks for watching Christian!

Great video! I guess I'm either buying vacuum and pressure pots, or I'm not doing resin. This really showed me that the time/money equation doesn't work out without them!

Great video Robert. I would love to see how you fix the bubbles in your castings please

@RobertTolone

3 жыл бұрын

I will add bubble repair to next weeks video. Although maybe an in-depth video (or a series of videos) on finishing, repairing, priming and painting castings would be a really good idea. Thanks for your comment!

I subscribed to your channel just because of this tutorial. As a hobbyist I have been casting on and off for a few years and ran into the same issues you did. I learned a lot from these two tutorials and there are techniques you used I had not thought of before. I will certainly use this knowledge on my next molds and casts. Thank you for taking the time and expense to make this tutorial.

@RobertTolone

3 жыл бұрын

Glad you found it helpful John. Thanks for watching!

Your channel is so underrated ! It's a real gem for Prop makers and Cosplayers using silicone and resin for moulding and casting without a vacuum-chamber :D I'll try to put your experience and awesome tips to good use next time i'll make a mould .

@RobertTolone

3 жыл бұрын

Thanks for watching! I appreciate your comment.

Great video as always! This is really helpful to us newbies. It gives me the confidence to try and start small, and then work my way up to using more professional equipment.

@RobertTolone

3 жыл бұрын

I made lots of bad, bubbly castings in the beginning. What triggered my equipment purchases was being hired to sculpt a set of Snow White and the Seven Dwarfs toy prototypes for Disney. Bad castings weren’t an option. I didn’t make a dime on that job but it paid for the equipment!

@wishcloudstudios

3 жыл бұрын

@@RobertTolone But is it possible to do hollow slush castings like this?

@RobertTolone

3 жыл бұрын

You can definitely make small slush castings in one-piece cut molds. The only difficulty is pouring multiple shots in the same mold because the pour sprue tends to fill up during the first pour. You also have to watch out for drips from any of the air vents.

great stuff

@RobertTolone

3 жыл бұрын

Thanks Jay!

Thank you for a great channel Robert. I just discovered your channel yesterday. I am starting to blend some of my hobbies by using my 3D printer to make models then make silicon molds of the model then finally casting the model in resin. Right now I am printing a set of pistol grips and a mold box. I bought the exact rubber mold media you used here. I have a clear two part epoxy resin that I will use to cast the parts but it is quite thick... I'm going to give it a go and just wanted to thank you for the tips I'm learning from your videos. I believe you are saving me time and money. Cheers amigo. I've subbed your channel.

@RobertTolone

3 жыл бұрын

Good luck with your project!

Hi. I hope your family its ok. I send you my best wishes.🌺 And I have to say that even you have no equipment. Its fantastic the tricks the knolowdge that you share with us . I love to see your channel. And I learn every week of your videos. 🌺💕

@RobertTolone

3 жыл бұрын

Thank you Adriana!

Love the videos! I'm planning to make a few molds and your videos are really helpful. But I'm wondering if you can't just tap your mold, filled with resin, on the table to remove bubbles. Like you would when baking and trying to remove bubbles from the batter. Would that work?

I subscribed! Thanks for the videos! I don't have a pressure pot and I'm just gonna start with silicon mold making and resin casting. I just ordered the resin. I already have the silicon here. So I'm gonna watch your videos to help me out a bit.

@RobertTolone

3 жыл бұрын

Good Luck and have fun! It’s a challenge - but when you pull good castings out of a mold it’s so satisfying!

@deveereigundam

3 жыл бұрын

@@RobertTolone thanks a lot! I'm designing my own toys. So everything is a challenge. I'm only starting this month too. Also, the brands I use here will be a lot cheaper than the ones you have there so I also have to figure out how they work. I will surely visit your videos multiple times too.

@RobertTolone

3 жыл бұрын

deveerei Send in pics of your projects. Love to see the toys you’re working on. Toy prototypes has been the bulk of my work for many years.

@deveereigundam

3 жыл бұрын

@@RobertTolone thanks, I did send some to your email just now.

I'm glad you had that problem at the end with measurement of the 4th try and pour. It's a great lesson to learn from with these products because they're very touchy if you're off on the measurement. But that is great information at the end about how the end result of resin will be with too much part A or B. I use Alumilite RC-3 a lot, and it will get either too brittle or too soft if mixed the slightest off.

@RobertTolone

3 жыл бұрын

Urethane resins are touchy about the ratios, no doubt.

Great video! What I like about it is that you face the same problems that hobby mold makers have. Small amounts of silicone and resin, most often no vacuum chamber or pressure pot, and a gram scale only if you're lucky (although even Harbor Freight sells these pretty inexpensively).

@RobertTolone

3 жыл бұрын

We have a gram scale here in this kitchen but it only reads in 5 gram increments! That’s useless for small amounts because you don’t know if you just poured 5 grams or 6,7,8 or 9! The next reading is at 10! So I couldn’t use the scale I have on hand. Good thing my situation is only temporary and I should be back in business pretty soon!

Hi Robert I was about to start to make my silicone moulds from crafters craft products and suddenly your this video pop up in my search. It was great guides to make my moulds to make some pendent for my friends. It’s so helpful and I followed your videos. Will let you know how my results goes 👍👍😊😍

@RobertTolone

3 жыл бұрын

You can do it! Definitely let us know how you get on.

2:35 Mmm, lard burger! My favorite!

@RobertTolone

2 жыл бұрын

😀

Been trying to cast some figures I sculpted last summer and keep getting bubbles! Thank you for making this. I feel better knowing even the greats struggle without the proper equipment. Perhaps it's time I invest in a pressure pot...

@glasshalffull2930

Жыл бұрын

Try vibrating the mold with a palm sander.

Really awesome video thank you for that. Would it be possible to make a translucent casting that it’s high tear resistant and flexible ?

@RobertTolone

3 жыл бұрын

It should be, given you find the right material for your project. You need a rubber with a high modulus of elongation. That means it can stretch a lot before it breaks. This information can be found on material data sheets provided by rubber manufacturers.

Evening the pressure!

Amazing videos I changed some of my design following your advices and it work very good so, thank you. I have 2 ideas for new videos, How to repair or fullfil bubbles The second one is how to create mold for thin elements for example capes or ice cream cones or CDs things like that Again thank you and as always and you have an amazing channel

@wishcloudstudios

3 жыл бұрын

Eric Strebel does a lot of thin walled resin casting in his videos. He also has a video called Resin casting tips tricks and hacks. There are so many creative people out there, it is amazing!

@venusbloodflow

2 жыл бұрын

@@wishcloudstudios Yes! There are some truly helpful and amazing videos on here. Doesn't help with my YT addiction though. 😆

thank you for all casting and molding videos !! these are the best and most interesting !I have a question about this video : How do you clean your brush after use it in resine ?? thank you and keep going ;)

@RobertTolone

3 жыл бұрын

Abel Blouzon I threw it away because it was very cheap and I didn’t have any acetone or lacquer thinner on hand. Both work well for cleaning resin off brushes.

@abelleba1756

3 жыл бұрын

@@RobertTolone thank you very much ;)

great videos, lots of great information 🙂 i am thinking of getting into resin casting myself. i was wondering, could you pour a small amount into the mold then rotate it until it starts to harden before filling it completely?

@RobertTolone

3 жыл бұрын

Yes, there are several videos on my channel about rotational molding. Check out my playlist “Hollow Casting With A Rotational Molding Machine”

Great vid, what I would do is weigh the bottles before I open and use them, because they are identical, then you can use those weights to work out the weight ratio. Since it’s 1:1, and the bottle volumes should be the same so the weight ratio is just A weight: B weight.

@RobertTolone

3 жыл бұрын

Yes, that would work. Thanks for the suggestion.

Nice job on all the videos in the duck series. You highlighted some of the issues entry level hobbyists are facing, specifically with regards to the cost of materials at the big box stores as well as on Amzon. What would you consider reasonable costs for silicone and resin? Not sure if you can easily quantify the costs based on volume or weight, but that would great info. Also, at what point does bulk purchasing make a difference in cost. Shelf life becomes an issue with bulk purchasing for those of us still working full time jobs with little time for the hobby. Thanks again for the videos and for sharing the knowledge. I hope your family situation is getting better.

@RobertTolone

3 жыл бұрын

Honestly I would never describe resin and rubber costs as “reasonable”. I use words like “outrageous”, “appalling” and “backbreaking”. Volume purchasing definitely affects the price. For me the sweet spot is 5 gallon buckets. But that is 40 pounds of rubber, 80 pounds of resin. The resin and rubber I bought from the craft store was five times more expensive than the price I pay for them in 5 gallon buckets. I pay approximately $400 for a bucket of rubber, including taxes and delivery. To buy the same volume of rubber from the craft store in those little boxes would cost $2000! For me, the cost of materials is a cost of doing business that I pass along to my customers. Truth is my labor is much more expensive than the materials. That’s because I make small prototypes for the toy industry and what they are mostly paying for are my sculpting skills. The molds and resins are small so the material costs don’t add up to much.

@peircedan

3 жыл бұрын

@@RobertTolone Good to know I have been wondering about this.

I've done some casting and had some good and bad days doing it. I have a pressure pot I have yet to hook up. Some of the molds I have to make are to big for the pressure pot so I'll do them outside of it. I just make model parts for myself so I'm not going to loose to much time, hopefully. Biggest problem I get is the resin gels up quick and I use the slowest set one I can get.

@RobertTolone

3 жыл бұрын

For the gelling problem I would try several solutions: Make sure the inlet sprue is big enough to pour the resin quickly and that the mold cavity is properly vented. Fill the mold in batches instead of a single pour. Cool the mold and resin to slow the cure. But beware of condensation that could cause the resin to foam.

Robert, thank you so much for all your time and wisdom!! Where are you based out of? I have two massive casting projects pending and would love to chat. Thanks, Adam K.

@RobertTolone

3 жыл бұрын

Contact me at roberttolone@yahoo.com

Speaking of pressure pots, how did you machine the groove for the big O-ring that goes on the door. Not sure if you did a video yet covering those chambers just wondering as that seems like a great design.

@RobertTolone

3 жыл бұрын

I designed the pressure pots but I did not fabricate them. The groove was machined in a milling machine long before CNC. I made a template and the machine followed a wooden pattern. Ahh the good old days! The welding was done by a professional welder who was certified in welding pressure vessels. This is not the place to try out your welding skills. If the tank is not properly made it could literally explode.

@greenteagod

3 жыл бұрын

@@RobertTolone For sure on the welding. I've seen what happens with half assed pressure vessels. Great design either way, such a simple method of making a door that is virtually explosion proof.

I slightly bent rod chucked into a drill makes a decent vibrator to help shake loose bubbles. I am trying to think of ways that foaming resin might be useful. Perhaps to fill a hollow shell to give it some stiffness without adding too much weight?

@RobertTolone

3 жыл бұрын

I’ll try that bend rod method out. The problem with the foaming is you’ll have to really work with it to get a predictable result. For instance, what’s the perfect ratio of water to resin? Foaming can be highly erratic and sometimes it only partially foams the mass of resin. As usual, I take the lazy man’s way out and just buy urethane foam resin. We have not even begun to explore foam casting on the channel. I use foam regularly for large castings.

Love the videos! I haven’t tried yet, just trying to absorb. Any tips/thoughts on molding / casting carve-able pumpkins for Halloween?

@RobertTolone

3 жыл бұрын

Not sure what you mean. Do you want to cast pumpkins that you can then carve? Or cast pumpkins that have already been carved?

@TheDolese

3 жыл бұрын

@@RobertTolone cast pumpkins that I can carve! Looking for ways to add customization to my Halloween display. Plus this could be fun

@RobertTolone

3 жыл бұрын

@@TheDolese You would have to cast the pumpkin in a material that could be carved. Something like wax or monster clay. The mold would be a complex one because the interior mold is a sphere and tricky to remove from the casting. And you are making a mold from a object that has a lot of moisture in it. Assuming you overcame all those problems you would have to cast the carving pumpkin. After you did the carving you would have to make a new mold to cast the piece in a permanent material. If you are using regular size pumpkins that is a lot of silicone, wax and resin! Unless you’re just doing those little miniature pumpkins.

@TheDolese

3 жыл бұрын

@@RobertTolone understood. I guess I completely underestimated the potential issues. Thank You very much for all of the info. I look forward to your videos!

@venusbloodflow

2 жыл бұрын

@@TheDolese Maybe coat the pumpkin in some sort of non porous material before casting?

How did you cut the silicone mold to make it a two part mold for opening and removing metal duck.

@RobertTolone

Жыл бұрын

I use an X-Acto #11 knife. And I use a new blade to cut the mold; the sharper the better.

This was very helpful. Thank you, I learned a lot! That's a great tip to use a water displacement test. I never would have thought of it! Just so I'm understanding this correct, with a gram scale, one would weigh the item to be cast, then based on that weight, we would mix a little more of the resin, right? You had me laughing.

@RobertTolone

3 жыл бұрын

You should find out what the specific gravity of your brand of resin is. The kind I use is 1.15 times heavier than water. So that is the ratio I would use. If the water weight was 100 g the resin weight should be 115 g.

@design321

3 жыл бұрын

@@RobertTolone Got it! :-)

Great video, using talcum powder takes away surface finish quality as well.

Awesome videos tnks a lot for sharing! What is the name of the tool you use to melt wax and where i can found it, also the wax sticks?

@RobertTolone

3 жыл бұрын

Here’s a link to a PDF file of the materials I use. The waxes are on the second page. www.dropbox.com/s/kz6mhmf7v5vpy7l/Material%20and%20Suppliers.pdf?dl=0

@AlejandroValentino

3 жыл бұрын

@@RobertTolone tnks a lot !!! im learing a lot with your videos!!! greetings from Monterrey México!!! hahah

I'm still watching the video while posting this comment for the 3rd duck, but I'd be curious if you could use 91% isopropyl alcohol either in a mister or rolled around right before pouring but it's helped tremendously for popping surface tension bubbles and it will cure while it air dries. I found this trick from messing with 3d printing with resin.

Would it have worked better with a vent? I learned about venting from you 😁 I love watching your videos, so informative and funny 😄

@RobertTolone

2 жыл бұрын

I mostly caught bubbles in the feathers on the chest and it is very difficult to vent a lot of little separate areas. You wind up with a forest of vents and those are very difficult to cut and close the mold around Otherwise, this duck was carefully designed to fill properly without the use of a sprue and vents. It would have been easy to cast using a pressure pot.

Hi Robert . I really enjoy your video’s. Just a question. Can you use a pressure chamber to remove bubbles instead of a vacuum chamber ? Do they work do the same job ? Thanks

@RobertTolone

3 жыл бұрын

They both help eliminate bubbles. But a vacuum chamber expands the bubbles so they rise quickly to the surface. A pressure pot compresses the bubbles until they are invisible. (unless the bubbles are too big, in which case it only makes them smaller).

@misslillysdaddy

3 жыл бұрын

@@RobertTolone thank you 🙏

I’m pretty new to resin casting. How do you repair the little bubbles?

@RobertTolone

3 жыл бұрын

Most auto body fillers like Bondo work as do epoxy clays like Magic Sculpt or Apoxie Clay. Plumber’s putty from the hardware store is usually an epoxy and it works as well. Sometimes the bubbles need to be opened up before filling, either with a X-Acto knife, small drillbit or sandpaper. You can also make fine sanding dust from your resin castings and mix it with five minute epoxy to make a pretty good filler.

Do you think a 5 gal plastic bucket with a lid and a shop vac would have enough vacuum to get the bubbles out?

@RobertTolone

3 жыл бұрын

No, it won’t work. I made a video about this exact subject: kzread.info/dash/bejne/g4lsrLVueL2vido.html

Bob, do you ever use a Vacuum Pot? From my beginning, I bought and used a Pressure Pot for the mold and then again when I poured the resin. I no problems. It seemed that other channels showed using the vacuum pot for the silicone and then using the pressure pot for the resin. I’m curious as to why they use both options? Thank you. Richard

@RobertTolone

3 жыл бұрын

I use a vacuum chamber to de-air the rubber before pouring it into the mold case. Then I use a pressure pot to suppress the formation of bubbles in the casting resin. They both help eliminate bubbles but by totally opposite methods.

Wow, this resin is like an Aero bar! Rob, could you talc, then use a dollar store air blaster with long straw, then blast it out of the details? I ask honestly, I do not know if this would work. What do you think about this technique?

Robert, may I ask you to make a video where you explain in what case we need a vacuum camera (to decrease pressure) and in what case we need a pressure pot (to increase it)? Cause I am confused a little bit... Thanks.

@RobertTolone

3 жыл бұрын

I use a vacuum chamber to remove air bubbles from liquid silicone rubber before I pour it around the model to make a mold. After the mold rubber is cured I cut open the mold and remove the model. Then I fill the mold with liquid urethane resin. Before the resin hardens I put the mold into a pressure chamber to crush any bubbles that might be in the resin. I leave it in the pressure pot until the resin is cured. Only then do I take the casting out of the mold.

@design321

3 жыл бұрын

@@RobertTolone Is there a way to use a standard kitchen pressure cooker to remove bubbles from the urethane resin?

@RobertTolone

3 жыл бұрын

@@design321 I’ve never tried it so I don’t know.

An old pressure cooker and mod it for connection to an air compressor...does the air need to be dried?

@RobertTolone

3 жыл бұрын

The air does not need to be dried but to be very careful that compressor does not exceed the maximum pressure rating of the pressure cooker.

Can you use the "vibrate to answer" feature of most cell phones to set the mold with resin in it to vibrate the bubbles out?

@RobertTolone

2 жыл бұрын

😄

Could it be the dye?

Robert, Really enjoying the videos, almost watched them all in the last 24Hrs and Subscribed. I have a question. Thinking of a small home setup, is there a small machine that provides both pressure and vacuum in one, or is it always the case that I will need to buy two separate pumps?? Keep up the great work, stay safe, Be Well. Cheers from London.

@RobertTolone

3 жыл бұрын

I have never seen such a machine. But I cannot give you a definitive answer.

When you say painting I think you will use paint and rotation casting method.Would something like this work? Pour the varnish inside, rotate the mold and pour out the varnish.

@RobertTolone

3 жыл бұрын

No, when I said paint I meant to brush the liquid resin onto the surface of the mold. I did not mean using paint or varnish to coat the mold. I don’t believe it will work to pour varnish into a rotation mold and then pour the excess varnish out. Varnish does not cure in the can because it is not exposed to air. I don’t think there is enough exposure to air inside of a mold for the varnish to dry properly. It might eventually dry after a very long time - but it might not.

Robert do you ever use plexiglass ….? Loving the tuition btw x

@RobertTolone

2 жыл бұрын

I have begun using clear front panels for my mold boxes in the videos so people can see how the molds fill. But I don’t usually use it in my shop. One advantage to plastic is that you don’t have to seal it like you do with wood. But most of the wood I use is scrounged or recycled.

@rowanstephenson3192

2 жыл бұрын

@@RobertTolone Thank you Sir for reply

Would vibrating it when poured help with air bubbles?

@RobertTolone

2 жыл бұрын

It can, as well as tilting and rocking the mold.

Bought a pressure tank thanks. I’m having so many issues lol

@RobertTolone

3 жыл бұрын

I hope you get it working for you Andrew.

@andrewnormore7093

3 жыл бұрын

@@RobertTolone Yeah learning a lot, got my first dice cast, lots of bubbles. I picked up OOMOO 30 because Im doing 3d prints, got a bad batch it was already rubber when opened! I'm getting to the end of the initial education load I feel, THANK YOU for your videos!

@RobertTolone

3 жыл бұрын

@@andrewnormore7093 Steep learning curve, no doubt!

Thanks for showing all of the successes and the things that didn’t work. I sent you a few emails. Thanks

Hey robert! Very cool videos very informative, congrats on the tutorials! I have aquestion. Do you make a living out of these mold making processes? or is it just a hobby or side project of yours? The reason im asking is because im thinking on diving into the world of miniature sculpting/casting etc.. Anyway great job sir !

@RobertTolone

3 жыл бұрын

I have made my living primarily as a sculptor. The mold making and casting are an essential part of what I do. My greatest financial success has been as a character sculpture for the entertainment industry. I showed my sculpture in galleries for several years, sold very well but never made a lot of money at it. You have to do it because you love it; there are many easier ways to make a living than sculpting and moldmaking.

Your are fantastic

@RobertTolone

3 жыл бұрын

Thanks Leticia!