The Permaprint Axis Inversion Dyes are different approach to latent fingerprint collection. Permaprint Axis Inversion Dyes are designed to color the background not the print itself. So, over time when the polycyanoacrylate sublimes away taking the print with it, the negative image made by the Permaprint Axis Inversion Dyes remains.
Permaprint Axis Inversion Dyes are used in combination with traditional superglue fuming. Once a fingerprint is fumed and fixed. The Permaprint Axis Inversion Dyes are used according to the instructions below.
AI RED adds reflected color from 550nm to 700nm providing contrast to clear and green to green shade yellow substrates like water bottles, lighters and clear tape.
AI RED is also available in an aqueous dispersion or powder form. Please send us a note from the Contact Us page or email to firstname.lastname@example.org if you are interested in purchasing this product.
Shown here are two sections form the same water bottle. The section on the right was fumed with AI RED after fuming with cyanoacrylate. As can be seen in the picture, the red tint has increased the contrast making the fingerprint more easily viewed.
AI Colors are provided as aqueous dispersions that can be used in standard fuming chambers currently used in crime labs. If used in conjunction with cyanoacrylate, fume the fingerprint as normal then process with the appropriate AI Color as listed below.
Shake AI Color to thoroughly mix the product.
Add the desired amount to a vapor wand or heating tin.
Add heat until color vapors form.
Allow vapors to flow over the sample.
Please click on the link to the right to order and test for yourself.