Minnesota Mining and Manufacturing Company

Darren Cooper

John J Stofko, Jr

Ranjan C Patel

John H Stibbard

Terence William Baldock

Donald J Newman

A negative-acting, photothermographic material having a first layer comprising an amine compound and a second layer comprising an amine-reactive dye which undergoes a visible change when in reactive association with the amine compound. The amine compound and the amine-sensitive dye are in non-reactive association at ambient and moderate temperatures, but at elevated temperatures the two components are able to interact to produce a visible change in the heated areas of the material. The materials are particularly suitable for the preparation of overhead projector transparencies.

Growing community of inventors

Andover, United Kingdom

Darren Cooper