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Cat. No. B-794110
Zinc chloride solution (250 ml, in MTBE/petroleum ether)
for changing the color of fingerprints developed with ninhydrins and making them
fluorescent (although the last is an unreliable procedure with regular ninhydrin).
Prints
developed with regular ninhydrin change color from purple to orange. With white
light, prints show an apparent loss of contrast, but under blue-green light (about
480 nm) they show better contrast than before. This is especially valuable with
papers that have blue-green printing on them, since the printing loses contrast
under this kind of lighting.
Page 2: DFO, plastic dipping-tray next
page »»
Page 3: 5-Methylthioninhydrin (5-MTN), 1,2-indandione (1,2-IND)
Page 4: ThermaNin, a ninhydrin derivative for fingerprints on thermal paper
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