Process for identification marking clear plastic articles

Details Process for identification marking clear plastic articles Process for identification marking clear plastic articles

G - Physics

02

B

8/3, 8/52

G02B 1/10 (2006.01) B41M 1/30 (2006.01) B41M 3/06 (2006.01)

Patent

CA 1129610

Abstract of the Disclosure A fade resistant, visually undetectable identi- fication mark is imparted to an optically clear plastic lens or the like by providing a marking composition com- prising a fluorescent dye and a liquid carrier material, and perferably including an inert sublimable solid diluent, applying the composition in a selected pattern on the sur- face of an article to be marked, removing the carrier material from the composition to leave a solid residue of the fluorescent dye and inert solid diluent, and perma- nently transferring the dye to a surface layer of the article as by heating. The mark enables a manufacturer to identify a particular article as its product by exposing it to ultra- violet radiation, yet the mark does not adversely affect the visible light optical properties of the article.

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