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Latent Print Examination » Questions from FP Experts for FP Experts... Processing, Testimony, and Technical Matters » Thermanin (1,2,3-indantrione monohydrate) « Previous Next »

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Jade Lyons
Posted on Monday, October 24, 2005 - 05:24 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
I have got some excellent results using thermanin, where the print develops sufficient purple colour and retain the text on receipts. Left overnight allows sufficient development time.
I am after some papers relating to ThermaNin but have been unable to come across any, it would be much appreciated if someone could please list some references or email them to:
jely@deakin.edu.au
Cheers.
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gary fisher
Posted on Wednesday, October 05, 2005 - 06:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Thanks for your comments. The indanedione seems to work well in the papers ive read. However the Canadians and us Brits dont seem to get as good results- perhaps humidity issues? I know israel have fully incorporated this procedure into their SOP's but here in the FSS the operational scientists seem to use a preparatory ethanol dip or DMAC (ignoring the H&S issues)which dont really give that good results. Im going to evaluate the thermanin and let you know how i get on. Thanks again!
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Christie Wallace
Posted on Saturday, October 01, 2005 - 01:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
I have looked at thermanin and the results are ok but are no where near as good as you get when usin 1,2-indanedione as per the Stimac paper in JFI.
Give that a go? Any more questions you can contact me on christie.s.wallace@uts.edu.au
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Webservant
Posted on Friday, September 23, 2005 - 07:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
The results appear promising per the processed document and closeup from the BVDA Thermanin website.

At face value it appears to be another option for thermal paper processing, like 1,2-Indanedione reported by John Stimac (JFI Vol. 53, No. 3, May/Jun 2003). Here is an image displaying excellent detail and (luminescing) contrast from Stimac's article.

Many folks use the 1,2-Indanedione procedure from Alex Mankevich's (CBDIAI) processing guide.

BVDA also sells 1,2-Indanedione.
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Gary Fisher
Posted on Friday, September 23, 2005 - 10:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Has anyone had any experience/read any papers about the new ninhydrin product from BVDA? We all know what happens to thermal papers when it is immersed in ninhydrin. This new product replaces a water group with an alcohol which is reported to allow latent print development without the substrate going black

Any points/comments would be welcomed!!

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