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NON-COPIABLE MATERIALS PRODUCED BY A SELECTIVE TRANSFER ADHESIVE PROCESS

IP.com Disclosure Number: IPCOM000027357D
Original Publication Date: 1996-Jun-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 74K

Publishing Venue

Xerox Disclosure Journal

Abstract

CFC International markets coated sheets which can be used to overcoat xerographic prints by sandwiching the sheets over a photocopy and applying heat and pressure. The properties of the sheets are such that the coating is only transferred to the printed area of a document. The blank paper or unimaged region is not coated. The process is give the acronym STAMP (Selectively Transferable Adhesive Magnetic Process) because the most common films use magnetic coatings which render printed areas magnetically readable. White coatings to "white out", or render invisible, printed areas are also available. It is proposed that the use of "whiteout-type" STAMP film containing an invisible fluorescent taggant would make areas of a document invisible so that they could not be photocopied or read under normal light.

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XEROX DISCLOSURE JOURNAL

NON-COPIABLE MATERIALS PRODUCED Proposed Classification

BY A SELECTIVE TRANSFER ADHESIVE PROCESS Int. C1. G03g 21/00 Edward Anczurowski
William A. Sullivan
Wayne R. Smith

U. S. C1.355/201

CFC International markets coated sheets which can be used to overcoat xerographic prints by sandwiching the sheets over a photocopy and applying heat and pressure. The properties of the sheets are such that the coating is only transferred to the printed area of a document. The blank paper or unimaged region is not coated. The process is give the acronym STAMP (Selectively Transferable Adhesive Magnetic Process) because the most common films use magnetic coatings which render printed areas magnetically readable. White coatings to "white out", or render invisible, printed areas are also available. It is proposed that the use of "whiteout-type" STAMP film containing an invisible fluorescent taggant would make areas of a document invisible so that they could not be photocopied or read under normal light.

An important aspect of this proposal concerns the selection of the dye (or dyes) best suited for this application. Several requirements are placed on the dye: it should be invisible; it should be machine detectable, using safe, inexpensive devices; and it should be compatible with the materials used in a typical STAMP donor sheet.

Suitable dyes include the following groups:

Fluorescent W absorbing dyes in which the chromophore is, for example, a stilbene, da...