Use of surfactants in paste printing ink

Details Use of surfactants in paste printing ink Use of surfactants in paste printing ink

C - Chemistry, Metallurgy

09

D

C09D 11/02 (2006.01) C09D 7/12 (2006.01) C09D 9/04 (2006.01)

Patent

CA 2180057

The present invention is directed to a paste printing ink containing a suitable solvent, a hard resin, pigment and other typical additives, the improvement comprising the addition of a small amount of a surfactant to the printing ink to enable the ink to be water washable on clean-up. The invention is also directed to a method for cleaning the printing apparatus with an aqueous cleaning solution, the method comprises utilizing a conventional printing ink to which a small amount of surfactant has been added in combination with an acidic fountain solution and washing the printing apparatus with a aqueous washing solution at a pH of between about 8.5 and 13.5, the washing solution containing detergent and a small amount of surfactant.

La présente invention vise une encre d'imprimerie en pâte contenant un solvant convenable, une résine dure, des pigments et d'autres additifs typiques. L'amélioration comprend l'addition d'une petite quantité de surfactif à l'encre d'imprimerie pour la rendre lavable à l'eau lors du nettoyage. L'invention vise aussi une méthode de nettoyage de la presse avec une solution aqueuse; la méthode couvre l'utilisation d'une encre d'imprimerie ordinaire à laquelle une petite quantité de surfactif a été ajoutée en combinaison avec une solution acide en fontaine et le lavage de la presse avec une solution de lavage à un pH allant de 8,5 à 13,5 environ la solution de lavage contient un détergent et une petite quantité de surfactif.

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