METHOD OF PRODUCTION OF THE PIGMENT FOR MANUFACTURE OF THE CARDBOARD AND PAPER Russian patent published in 2006 - IPC D21H19/36 D21H19/38 D21H19/44 D21H19/46 D21H19/64 D21H17/67 D21H17/69 D21H17/70 D21H17/36 C09C1/02 C09C1/40 C01F7/02 C01F11/02 

FIELD: pulp and paper industry; methods of production of the pigment for manufacture of the cardboard and paper.

SUBSTANCE: the invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. Calcium hydroxide suspension is treated with aluminum sulfate solution in the aqueous medium at stirring. The treatment is conducted in the aqueous medium containing the binding in the dissolved state. The binding is chosen from the group, which includes starch and polyvinyl alcohol in the amount of 0.5-5.0 mass % from the mass of the absolutely dry pigment, and-or the colorant in the amount of 0.1-0.5 mass % from the mass of the absolutely dry pigment. The technical result of the invention is the improved quality of the pigment and expansion of its field of application.

EFFECT: the invention ensures the improved quality of the pigment and expansion of the field of its application.

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