help...sth about dry ninhydrin methods

[wahaha]

does anybody konw Robert Olsen Jr. 's two nin-dry techniques—one describing the use of applying ninhydrin crystals directly on the evidence and then placing the item in a humidity chamber?

[Ernie Hamm]

I worked with Bob, but did not hear of that method. You might look at the following in that same vein (dry ninhydrin):

Advanced Solvent-Free Application of Ninhydrin for Detection of Latent Fingerprints on Thermal Paper and Other Surfaces, Lothar Schwarz and Inga Frerichs, Journal of Forensic Sciences, 47:6 (2002) Comment: Use of ninhydrin crystals in a heated vacuum situation to reduce background

[wahaha]

I worked with Bob, but did not hear of that method. You might look at the following in that same vein (dry ninhydrin):

Advanced Solvent-Free Application of Ninhydrin for Detection of Latent Fingerprints on Thermal Paper and Other Surfaces, Lothar Schwarz and Inga Frerichs, Journal of Forensic Sciences, 47:6 (2002) Comment: Use of ninhydrin crystals in a heated vacuum situation to reduce background

thx Ernie,could you please send me this paper cause I'm in China,I can't find this magzine.....

[jpadilla5]

Here is an article in SCAFO that has one method - placing the thermal paper between 2 paper towels that have been soaked in ninhydrin and dried. They are placed in a plastic bag for a couple of days for latent development.

http://www.scafo.org/library/140203.html

[wahaha]

Here is an article in SCAFO that has one method - placing the thermal paper between 2 paper towels that have been soaked in ninhydrin and dried. They are placed in a plastic bag for a couple of days for latent development.

http://www.scafo.org/library/140203.html

I've read it already ,thank u

[gaganforensics]

u can also try out this work by Dr. O.P.Jasuja
Deciphering Latent fingerprints: Sandwich method revisited
http://forensic-evidence.com/site/ID/sa ... ethod.html

With kind regards
gds