Patent ID: 7955682

Claim:
A system for at least one of recording or transmitting optical data or visual images, comprising: an optical data or visual image recording medium including: a substrate; and a markable coating on the substrate, the markable coating including a leuco dye and a developer precursor, wherein the developer precursor includes a compound that undergoes rearrangement in response to a stimulus so as to become a developer that reacts with the leuco dye and wherein the developer precursor is selected from di-O-acetylated curcuminoids, di-O-benzoylated curcuminoids, and mixtures thereof; and at least one of a light or heat source positioned so as to at least one of illuminate or heat the recording medium in a predetermined manner to i) cause a photochemical or photothermal rearrangement of the developer precursor to form the developer which reacts with the leuco dye to form an optically detectable mark, or ii) cause at least one previously formed optically detectable mark on the markable coating to produce at least one readable pattern.