Xerox Corporation

Palo Alto Research Center Inc.

Tyler Norsten

Gabriel Iftime

Peter Michael Kazmaier

Kentaro Morimitsu

Guerino G Sacripante

Naveen Chopra

Eric J Shrader

Fazila Seker

Fazilia Seker

Exemplary embodiments provide compositions and methods for making and using an erasable medium that can contain oligomeric photochromic materials such as spiropyran oligomers, wherein the oligomeric photochromic material can include a plurality of photochromic groups such as spiropyrans covalently connected together by one or more linkers.

Oligomeric spiropyrans for erasable medium applications

The present disclosure provides a reusable and reimageable medium including a substrate coated with a photochromic polymer. The photochromic polymer has a glass transition temperature ranging from 30&#xb0; C. to 150&#xb0; C., such as from about 30&#xb0; C. to about 100&#xb0; C., and the coated substrate converts to a colored state when both UV light and temperatures ranging from 30&#xb0; C. up to 100&#xb0; C. are applied to the coated substrate. The present disclosure also provides a method for producing and using the reusable and reimageable medium.

Reimageable and reusable medium and method of producing and using the reimageable and reusable medium

An image-forming medium and methods for forming and imaging the medium are provided. The disclosed medium can be strongly colored under room illumination (or deliberate UV) and can be selectively discolored at an appropriate light wavelength to form an image. In one embodiment, the image-forming medium can include a substrate (e.g., a sheet of paper), a photochromic material incorporated with the substrate, and a photo-absorbing material incorporated with the photochromic material. Exemplary methods for using the image-forming medium to make a transient image can include first forming the image-forming medium by applying a coating solution containing photochromic material to the substrate or paper. The image-forming medium can have a medium color and can then be selectively exposed to a radiation through a mask to convert the photochromic material from a colored form to a colorless form and thus to form an image having a color contrast with its background.

Reverse write erasable paper

Growing community of inventors

Singapore, Singapore

Tyler Norsten