I was asked a question by someone and I couldn't really answer so I'm hoping someone here does know.
What is the difference between sticky-side powder and regular powder? I know the difference in their uses but what's different about the actual powder component?
We normally make our own sticky-side powder suspension (Lightning Liquinox formula) but have some sticky-side powders in our cabinet that haven't been ever used and I'm curious to know how they differ from my black Lightning powder.
Difference in Powders
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josher89
- Posts: 509
- Joined: Mon Aug 21, 2006 10:32 pm
- Location: NE USA
Difference in Powders
"...he wrapped himself in quotations—as a beggar would enfold himself in the purple of emperors." - R. Kipling, 1893
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gerritvolckeryck
- Posts: 51
- Joined: Tue Apr 25, 2006 12:03 pm
- Location: Brussels - Belgium
Re: Difference in Powders
You can take a look at the MSDS sheets (Sirchie, Lightning doesn't say anything):
Black sticky side: http://d1zh4ok0q8k7dm.cloudfront.net/me ... p50d_2.pdf : iron oxide (100 % ?)
Black powder : http://d1zh4ok0q8k7dm.cloudfront.net/me ... p698_2.pdf : iron oxide (66%) and lycopodium (33 %)
Although several other mixtures can be possible for black powder. "Fingerprint Mechanics" by Walter Scott (1951) is a good source for all kinds of fingerprint powder mixtures.
All the best,
Gerrit
Black sticky side: http://d1zh4ok0q8k7dm.cloudfront.net/me ... p50d_2.pdf : iron oxide (100 % ?)
Black powder : http://d1zh4ok0q8k7dm.cloudfront.net/me ... p698_2.pdf : iron oxide (66%) and lycopodium (33 %)
Although several other mixtures can be possible for black powder. "Fingerprint Mechanics" by Walter Scott (1951) is a good source for all kinds of fingerprint powder mixtures.
All the best,
Gerrit
Gerrit Volckeryck
Federal Judicial Police
Forensic Science Directorate
Brussels, Belgium
Federal Judicial Police
Forensic Science Directorate
Brussels, Belgium