Process for manufacturing coated paper
AssigneeOji Paper Co., Ltd.
InventorsTetsuya Hirabayashi, Hideyuki Suzuki, Terunobu Fukui
Life of this patent
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Abstract
A process for manufacturing a coated paper for use in printing is characterized in that the coated paper for printing is produced by coating a color consisting mainly of pigment and a water-soluble binder made of starch or starch derivatives to the surface of a base paper, then drying and finishing it. Steam or an aqueous penetrant solution having a penetrating force of less than 50 seconds is sprayed or applied over the dry coated layer surface of the coated paper, prior to it being finished with a calender, for redistributing the water-soluble binder in the coated layer in order to correct its uneven distribution, which is the cause of printing mottle during the offset printing operation.
Claims7
A process for manufacturing a coated paper used in printing, said process comprising the steps of:
- coating a layer containing a color-containing pigment and a water-soluble binder on a base paper surface, said binder comprising at least one member selected from the group consisting of a starch and a starch derivative;
- drying the coated paper surface;
- applying an aqueous penetrant solution to the dried coated paper surface in an amount of 1.about.1 g/m.sup.2 to redistribute the water-soluble binder in the coating layer, said aqueous penetrant solution having a penetrating force of less than 50 seconds as determined by the canvas disk method;
- drying the coated paper;
- and finishing the dried coated paper with a calender.
Dependencies are inferred from the claim text.