The Home Scientist 006 - Forensic Fingerprinting I: Iodine Fuming

Use a tiny amount of crystal iodine (or substitute drugstore tincture of iodine) to reveal latent fingerprints on paper and other porous surfaces. Iodine fuming is the oldest method for revealing latent fingerprints, and is still in very wide use by professional forensics technicians.
More information: blog.makezine.com/science_room...
Forensic Latent Fingerprinting Kit: www.makershed.com/ProductDetai...
Before anyone comments, a note about pronunciation. Many scientists pronounce iodine as eye-oh-deen--by analogy to the other halide elements, fluorine, chlorine, bromine, and astatine--rather than eye-oh-dyne. Many people born before 1940 pronounce it eye-oh-dinn. Any of the three is correct.

Пікірлер: 25

  • @MATT-AT
    @MATT-AT4 жыл бұрын

    You have a Morgan Freeman tone in this video, I can't be the only one to hear this, was extremely calming whilst I was watching this hearing your instructions as it were, neat video aswell I would've loved it if our science at school did some more practical stuff when I was there, they just left most of the heavy lifting to computers, got to dissect some stuff though, You've a new sub :)

  • @riyadogra7381
    @riyadogra73816 жыл бұрын

    sir ur video was really helpful .. thanks!

  • @blueduderanch
    @blueduderanch14 жыл бұрын

    awesome, thanks for clearing that up.

  • @labroske
    @labroske11 жыл бұрын

    Cyanoacrylate fuming is a possibility ('Super Glue') - or the application of photoluminescent nanocomposites and a UV source. The likelihood of getting any usable material depends upon how porous the rock and how recently it was touched. Frankly, you're probably not going to be able to get anything. The pores in the material disrupt the the print - sort of like painting over a rough surface.

  • @carmensita6748
    @carmensita67487 жыл бұрын

    I love your voice

  • @Sakura123STARS
    @Sakura123STARS11 жыл бұрын

    Is it okay if you use the liquid iodine instead of the crystals?

  • @yahoorif
    @yahoorif14 жыл бұрын

    could it be fatal if I accidentally inhale the iodine vapour?

  • @slovenianchemis
    @slovenianchemis12 жыл бұрын

    I've bought the drugstore tincture of iodine and i wanna know how much ml do i need to do the iodine fuming i have tincture of iodine 10% of iodine can you help me

  • @abdalmalek4481
    @abdalmalek44814 жыл бұрын

    wow..perfect!

  • @danbboy2012
    @danbboy201212 жыл бұрын

    can anyone tell me why this happens?

  • @kevinleven7482
    @kevinleven74825 жыл бұрын

    My left ear is happy

  • @blueduderanch
    @blueduderanch14 жыл бұрын

    ninhydrin is carcinogenic isnt it, and i comes up with a purple colour. we use it to visualise amino acids.

  • @gracecapuz-soriano5014
    @gracecapuz-soriano50142 ай бұрын

    ❤❤❤

  • @saml4332
    @saml43322 жыл бұрын

    Hi Robert. Writing for a friend. Why does the solution taste so bad when swallowed in large quantities? Also, it seems to stain the eyeball. Please respond. Thank you.

  • @hillyheights-pn6qs

    @hillyheights-pn6qs

    11 ай бұрын

    Can you tell me please is thermal paper also needed to clean from blanket or hot blanket or water?

  • @13rugrat
    @13rugrat14 жыл бұрын

    his voice puts me to sleep thumbs up if this happens to u

  • @xanderfavazza9674
    @xanderfavazza96744 жыл бұрын

    hi how are you

  • @blueduderanch
    @blueduderanch14 жыл бұрын

    oh right, i thought it did because it had a risk R45 on the paper we were handed out for our lab work. thought i better be safe than sorry.

  • @ecbryam_c5936
    @ecbryam_c59363 жыл бұрын

    1:24

  • @gumdrop1637
    @gumdrop16373 жыл бұрын

    this is my home work

  • @kafkayash2265
    @kafkayash22652 жыл бұрын

    I wonder of this guy is alive now🤔

  • @yahoorif
    @yahoorif14 жыл бұрын

    ok, but I still gonna put on my chemical mask.

  • @gumdrop1637
    @gumdrop16373 жыл бұрын

    sus af

  • @lodak7817
    @lodak78175 жыл бұрын

    You say iodine really dumb