US 6,982,109 B2
Method for rendering surface layer of limited play disk lightfast
Marianne Krieg-Kowald, Barrington, R.I. (US)
Assigned to FlexPlay Technologies, Inc., Saco, Me. (US)
Filed on Dec. 10, 2001, as Appl. No. 10/16,103.
Claims priority of provisional application 60/254610, filed on Dec. 11, 2000.
Prior Publication US 2002/0102499 A1, Aug. 01, 2002
Int. Cl. B32B 3/02 (2006.01)
U.S. Cl. 428—64.1 12 Claims
OG exemplary drawing
 
1. A method for using a readout-limited optical media comprising:
(a) providing the media with at least one color-forming layer that embodies a readout-limiting mechanism;
(b) providing a protective layer that overlies said at least one color-forming layer, said protective layer comprising an additive that does not interfere with readability of said media for a duration of a readout period; and
(c) activating said additive upon exposure to a source of optical radiation that is suitable for reversing said color-forming layer from an optical readout inhibiting state to an optical readout-enabling state such that, when activated, said additive undergoes a transformation from an optical readout enabling state to an optical readout inhibiting state.