An aqueous suspension of pigments, fillers or minerals, process preparation and use thereof for, paper contains it, particular pigment or minaral, method for making same, process for making sheet of papier

摘要

The invention concerns a pigment, filler or a mineral containing natural calcium carbonate, treated with one or several H3O+ ion donors and gaseous CO2, for reducing constant surface paper weight, without loss of physical properties when it is used as mass or coating pigment for said paper. In particular, the invention concerns a pigment, filler or mineral containing a natural carbonate calcium, or dolomite, or talcum-calcium carbonate, kaolin-calcium carbonate mixtures alone or combined with natural and/or synthetic fibres, treated with one or several H3O+ ion donors ranging from moderately strong to strong in the presence of CO2 gas.