Patent ID: 7060654

Claim:
An imaging composition comprising: a matrix having a first antenna and an activator; and an alloy dispersed in said matrix as an independent phase, said alloy having a second antenna and further having a leuco-dye and an accelerator uniformly distributed in the alloy, wherein each of the first antenna and the second antenna is independently selected from at least one compound selected from the group consisting of quinone, a metal complex, azo, croconium, a squarilium dye, a hexafunctional polyester oligomer, and a compound represented by one of the following formulas: where M 1 is a transition metal, R 1 , R 2 , R 3 , and R 4 are alkyl groups or aryl groups with or without halo substituents, and A 1 , A 2 , A 3 , and A 4 are S, NH, or Se; and where M 2 is Ni or Cu and R 5 and R 6 are aryl groups or alkyl groups with or without halo substituents.