Patent ID: 7527914

Claim:
An optical disk, card or media for use in an optical read-out system that comprises a light source operative to produce an interrogating beam of light for reading data structures, comprising: a. a plurality of data structures that are readable by the interrogating beam of light; and b. a composition on or in the optical disk disposed so that when the optical disk, card or media is used in the optical read-out system, the interrogating beam of light passes through the composition before or after contacting some or all the of the data structures, wherein the composition comprises: i) a solid polymeric matrix with an olefinic compound dissolved or uniformly dispersed therein; and either ii) a transition metal catalyst and a thiophenol; or iii) a catalytic amount of a thiyl radical, wherein either the transition metal catalyst or the thiyl radical are present in the amounts sufficient to cause carbon-carbon double bond cleavage, oxidation, or isomerization in the olefinic compound when exposed to ambient conditions, and wherein the composition is substantially transparent to the interrogating beam and/or is substantially colorless.