Protection of transient documents using a photochromic...

Details Protection of transient documents using a photochromic... Protection of transient documents using a photochromic...

2007-01-23

2007-01-23

Schilling, Richard L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

C430S333000, C430S335000, C430S338000, C430S345000, C430S962000

Reexamination Certificate

active

11139890

ABSTRACT:
A protective, switchable layer adapted for use in transient imageable documents is disclosed. The protective layer can be disposed on an underlying photochromic layer and enables writing or imaging the underlying layer. The protective layer prevents unintentional writing on the photochromic layer, such as can otherwise occur from exposure to certain wavelengths of light.

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