Dual-layer protected transient document

An image forming process comprising:

• (a) providing a medium comprising a substrate having an imaging layer and a protective layer on opposing sides of the substrate, wherein the medium is reimageable on the imaging layer, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast;
• (b) exposing the medium to an imaging light corresponding to a predetermined image to result in an exposed region and a non-exposed region, wherein the color contrast is present between the exposed region and the non-exposed region to allow a temporary image corresponding to the predetermined image to be visible for a visible time;
• and
• (c) subjecting the temporary image to an indoor ambient condition for an image erasing time to change the color contrast to the absence of the color contrast to erase the temporary image.

A reimageable medium for receiving an imaging light, the medium comprising:

• a substrate having a first side and an opposing side;
• a protective layer located on the first side of the substrate, comprising a light absorbing material;
• and
• an imaging layer located on the opposing side of the substrate, comprising photochromic material capable of reversibly converting among different forms,
• 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 the 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, and
• 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.