FIELD: paper.
SUBSTANCE: invention can be used in making paper, coating paper, in making plastics, adhesives, sealants and paints. To prepare an aqueous suspension containing precipitated calcium carbonate, carbonisation of at least one source of calcium, which is substantially insoluble in water, at least one source of carbonate in the presence of at least one water-soluble manganese source is carried out. At least one source of water-soluble manganese is present at the carbonisation step in amount of 10 parts per million to 1000 parts per million in terms of dry weight of at least one source of calcium.
EFFECT: invention increases opacity of products including precipitated calcium carbonate without using synthetic dyes.
19 cl, 4 dwg, 7 tbl, 6 ex
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