Paper coating for ink jet printing
First Claim
1. A method for improving print resolution comprising applying an aqueous penetrant promoter composition to a cellulosic web to provide an ink receptive coating and printing on the coated web wherein the promoter composition contains from about 2 to about 10 parts by weight polyvalent metal salt, from about 15 to about 40 parts by weight water, an effective amount of cationic amine polymer and surfactant and from about 35 to about 60 parts by weight of an ink penetrant promoter selected from the group consisting of 1,2-propanediol, dipropylene glycol and mixtures of 1,2-propanediol and dipropylene.
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Accused Products
Abstract
The invention provides an improved paper coating composition for ink jet printing applications. The composition contains from about 2 to about 1 parts by weight polyvalent metal salt, from about 0 to about 30 parts by weight deionized water, an effective amount of cationic amine polymer and surfactant and from about 35 to about 60 parts by weight of an ink penetrant promoter selected from the group consisting of 1,2-propanediol, dipropylene glycol and mixtures of 1,2-propanediol and dipropylene glycol. Since the composition is free from ethylene glycol components, the composition is safer to use and less harmful to humans and the environment. The composition has also been found to provide improved ink drying with less bleeding or smearing of image.
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Citations
7 Claims
- 1. A method for improving print resolution comprising applying an aqueous penetrant promoter composition to a cellulosic web to provide an ink receptive coating and printing on the coated web wherein the promoter composition contains from about 2 to about 10 parts by weight polyvalent metal salt, from about 15 to about 40 parts by weight water, an effective amount of cationic amine polymer and surfactant and from about 35 to about 60 parts by weight of an ink penetrant promoter selected from the group consisting of 1,2-propanediol, dipropylene glycol and mixtures of 1,2-propanediol and dipropylene.
Specification