Patent ID: 7214456
Filing Date: 2007-05-08
Classification: G03C,Y10S

Abstract:
1. A reimageable medium comprising: a substrate; and a photochromic material havin a back reaction which can be induced thermally and optionally where the back reaction also can be induced by absorption of light, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast, wherein the medium has a characteristic that when the medium exhibits the absence of the color contrast and is then exposed to an imaging light corresponding to a predetermined image to result in an exposed region and a non-exposed region, the color contrast is present between the exposed region and the non-exposed region to form a temporary image corresponding to the predetermined image that is visible for a visible time, wherein the medium has a characteristic that when the temporary image is exposed to an indoor ambient condition for an image erasing time, the color contrast changes to the absence of the color contrast to erase the temporary image wherein the indoor ambient condition comprises darkness at ambient temperature, and wherein the medium is capable of undergoing multiple cycles of temporary image formation and temporary image erasure.