Polaroid Corporation

Rong C Liang

William C Schwarzel

Daoshen Bi

F Richard Cottrell

Jayprakash C Bhatt

Tung Feng Yeh

Michael A Young

Robert P Short

Stephen R Sofen

Rita S Shon Baker

An imaging medium comprises a substrate carrying a color-change layer. This color-change layer comprises two layers or phases comprising two color-forming reagents which react upon heating to cause a change in the color of the layer. The color-change layer is deactivated by exposure to actinic radiation such that after deactivation it no longer undergoes its thermal color-change. The color-change layer is detachable from the substrate by heating to a temperature lower than required to cause the color change, so that upon contact of the imaging medium with a receiving sheet each individual pixel of the color-change layer may be left attached to the substrate, transferred to the receiving sheet but left uncolored, or transferred to the receiving sheet and colored to a color level determined by the energy used in the associated thermal print head element. The medium may be imaged by imagewise heating, followed by blanket exposure to deactivating actinic radiation, or by imagewise exposure to the actinic radiation, followed by heating of the whole color-change layer.

Heat and radiation-sensitive imaging medium, and processes for use thereof

Heat and radiation-sensitive imaging medium, and processes for use

The addition, to a thermal imaging medium comprising a color-forming compound which undergoes a change of color upon heating above a color-forming temperature for a color-forming time, the color-forming

Stabilization of thermal images

Growing community of inventors

Newton, MA, United States of America

Rong C Liang