University of Ottawa

Shipley Company LLC

Juan C Scaiano

Roger F Sinta

Gary S Calabrese

Gerry Charette

David Victor Avila

Andr&eacute; Simard

An apparatus for flash photolysis has a light source and an optical fiber for directing light from the light source and through a sample. A laser or other such device is provided for initiating a chemical change within the sample. Additionally, a device is provided for determining the change in absorption of light by the sample during the chemical change.

Apparatus for laser flash photolysis

The present invention relates to a method for the inhibition of photo-yellowing in paper rich in lignin by treatment of pulp or paper rich in lignin with a compound containing hydroxy functionalities that are capable of forming a ketal with a carbonyl group in an acidic environment. In a preferred embodiment the acidic environment is provided by the presence of an acidic clay or an acidic zeolite.

Inhibition of photo-yellowing in paper

The present invention relates to novel compositions that contain an activator system that comprises a photoactivator, acid generator and chain extender. Methods and articles of manufacture that comprise such compositions are also provided. In a preferred aspect, the compositions are photoimageable.

Growing community of inventors

Gloucester, Canada

Juan C Scaiano