Old Ninhydrin

[ER]

How would you suggest handling checks that were processed with ninhydrin 35 years ago, and now you need to bring the prints back a bit because they've faded over time?

Any ideas? Reapply ninhydrin? Zinc chloride? Indanedione?

[Ernie Hamm]

“Laser Detection of Latent Fingerprints: Ninhydrin”, D.W. Herod and E.R. Menzel, Journal of Forensic Sciences, 27:1 (1982), Comment: The use of dye lasers to enhance weak ninhydrin print

[Mike F]

Hi Ernie,

I sent you an e-mail via this web site, however I'm not sure if it went through. Can you contact me at my personal e-mail address? appliedforensics@gmail.com

Thanks,

Mike French