Printing paper and method of image formation employing the same
AssigneeCanon Kabushiki Kaisha
InventorsAkio Suzuki, Masayoshi Takahashi, Yoshinobu Shimomura, Tatsuo Takeuchi, Yoshihiro Takada, Mamoru Sakaki, Masato Katayama
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Abstract
A printing paper is provided which is neutral paper as the base paper comprising an ink-penetration retarder on a printing face to retard penetration of liquid ink containing a nitrogen compound, a substance as an internal additive of the paper to absorb ammonia or an ammonium ion released from the nitrogen compound in the ink, and a water-soluble inorganic salt in an amount ranging from 0.01 to 0.2% by weight. Printing methods are also provided which use the above printing paper.
Claims29
A printing paper suitable for use in ink-jet recording systems making use of an ink containing a nitrogen compound, comprising a base paper containing as a filler, a material which absorbs ammonia or ammonium ions released by the nitrogen compound in the ink, and an ink penetration-retarding agent provided on the base paper, wherein the printing paper has a water extract pH of not lower than 6 and a Stockigt sizing degree of from 16 to 40 seconds, and contains a water-soluble inorganic salt on a surface thereof in an amount ranging from 0.01 to 0.2% by weight.
A printing paper suitable for use in ink-jet recording systems making use of an ink containing a nitrogen compound;
- comprising a base paper containing as a filler, synthetic aluminum silicate or kaolinite, and a material selected from the group consisting of casein, starch, carboxymethylcellulose, hydroxyethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, sodium polyacrylate, polyacrylamide, styrene-butadiene rubber, acrylic resin, styrene-maleic acid copolymer, styreneacrylic acid copolymer, silicone oil, paraffin wax and fluorine compound, provided on the base paper, wherein the printing paper has a water extract pH of not lower than 6 and a Stockigt sizing degree of from 16 to 40 seconds, and contains a water-soluble inorganic salt on a surface thereof in an amount ranging from 0.01 to 0.2% by weight.
Dependencies are inferred from the claim text.