| 摘要 |
<p>(a) A printed medium comprising a light-shielding substrate, a coloring layer which develops color by heat and of which the color developed is fixed by light, and a light-shielding sheet peelable and shielding the coloring layer from light in order. (b) A printed recording medium comprising an optical recording member which includes a light reflecting layer and a data recording layer either of which is a data record reading surface and the other a printed indication surface, and further comprising a coloring layer which develops color by heat. Especially the optical recording member has a disklike shape, and the coloring layer has a light-shielding sheet and the color developed is fixed by light, like the printed medium (a). A heat-insulating layer and an elastic layer are preferably formed between the coloring layer and the optical recording member.</p> |
