What type of powder is used on which type of surfaces to find fingerprints?
Answer:There are several different types and their use depends upon the surfaces and conditions. Two commonly used ones are: Carbon Black, and a powder made of very finely ground metal filings.Answer:Wikipedia indicates the following powders can be used (differnet colored powders are required to show prints in different colored surfaces)WhiteHaddonite White (titanium dioxide 4 parts, kaolin 1part, French chalk 1 part or titanium dioxide 60%, purified talc 20%, kadin lenis (light) 20%).Lanconide (zinc sulfide 4 parts, zinc oxide 4 parts, barium sulfate 4 parts, titanium dioxide 4 parts, bismuth oxychloride, 4 parts, calcium carbonate 1 part)Mercury-chalk (hydrargyrum-cum-creta) now no longer used, as it represents a serious health risk.Titanium dioxideWhite tempera (starch, titanium dioxide)ChalkBlackCharcoalGraphiteDactyl black (Graphite, lampblack, gum acacia)Dragon's blood (powdered resin of the Daemonorops Draco plant)Haddonite black (lampblack 70%, graphite 20%, powdered acacia 10%)LampblackPhotocopier tonersOtherAluminium powderMetal powdersLycopodiumMagnetic powdersFluorescent powdersAnthracene