Cornstarch and Ninhydrin
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cpatti
- Posts: 9
- Joined: Fri Jul 22, 2011 10:42 am
Cornstarch and Ninhydrin
I have a case that involves some harassment letters that are covered in cornstarch. Has anyone ever tried to process with Ninhydrin if cornstarch is present?
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SConner
- Posts: 145
- Joined: Wed Mar 04, 2009 11:06 am
Re: Cornstarch and Ninhydrin
Shake it off? Blow it off? The corn starch isn't going to soak into the paper.
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Tazman
- Posts: 244
- Joined: Fri Apr 23, 2010 7:25 am
Re: Cornstarch and Ninhydrin
Experiment already. Buy a box of cornstarch, sprinkle or dust it onto some sheets of copy paper with test prints on the paper, then experiment with shaking it off or blowing the starch off. See if it turns purple or interferes with the ninhydrin.
"Man was born free, but he is everywhere in chains." -- Jean-Jacques Rousseau
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Les Bush
- Posts: 229
- Joined: Tue Jul 05, 2005 4:29 am
- Location: Australia
Re: Cornstarch and Ninhydrin
cpatti,
the Ninydrin reaction is about the Nh2 or amine group that is present in the substrate or on the substrate, corn starch Molecular Formula: C27H48O20. No Nitrogen or amine group there so it should be fine with Ninhydrin.
the Ninydrin reaction is about the Nh2 or amine group that is present in the substrate or on the substrate, corn starch Molecular Formula: C27H48O20. No Nitrogen or amine group there so it should be fine with Ninhydrin.