Method of decreasing the rate of photoyellowing

Details Method of decreasing the rate of photoyellowing Method of decreasing the rate of photoyellowing

D - Textiles, Paper

21

H

D21H 17/63 (2006.01)

Patent

CA 2633507

A method of decreasing the rate of photoyellowing in paper containing mechanical pulp comprising: applying an aqueous solution containing an effective amount of one or more salts of thiocyanic acid on the surface of a paper sheet in a papermaking process.

La présente invention concerne un procédé de diminution de la vitesse de jaunissement des photos dans des papiers contenant de la pulpe mécanique, comprenant les étapes de : application d~une solution aqueuse contenant une quantité efficace d~un ou plusieurs sels d~acide thiocyanique sur la surface d~une feuille de papier dans un procédé de fabrication de papier.

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