Anyone saw Mythbuster's eposide of "Crimes and Myth-Deneanors 2" They were trying to copy finger prints on acetate paper and copper coated circuit board. I was wondering the chemical on the photo they coated with and the acid to make the photo black color.
2007-02-25 11:21:26 · 3 answers · asked by mksangelgirl 1 in Arts & Humanities ➔ Visual Arts ➔ Photography
See here: http://www.cheresources.com/photochem.pdf
2007-02-25 21:05:00 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Many chemicals are light sensitive, but silver halides, such as Silver Nitrate, might be the ones that you are most familiar with. If you have taken HS or college chemistry, you should have had a couple of experiments working with silver nitrate. It has been used in medicine for eons in such areas as washing the eyes of newborns to kill syphillis infection in the eyes, or to cauterize a wound, or even a mouth ulcer to stop it from bleeding. It burns the skin. It was used by the author of BLACK LIKE ME which was written int he 60s or late 50s to turn the skin of a white man about the same color as many blacks - it will turn the skin brown. It is used by vets to burn the claws of cats and dogs to keep them from bleeding. It was one of the first emulsion chemicals used in black and white photography - on both the paper and the film. Some older black and white photos might show a tint of silver in them if they were not developed absolutely right.
I don't know about now, but not long ago, Kodak was the largest user of silver in the world
2007-02-26 14:55:01 · answer #2 · answered by Polyhistor 7 · 0⤊ 0⤋
I didn't see that episode but I can tell you that silver halide is the primary element in film or paper which turns black when exposed to light.
2007-02-25 20:51:37 · answer #3 · answered by wackywallwalker 5 · 0⤊ 0⤋