A process for the preparation of a mineral filler product, the process comprising the steps of: (a) providing a calcium carbonate-containing material; (b) providing at least one agent being a polyol selected from the group consisting of saccharides, glycerol, polyglycerol, ethylene glycol, propylene glycol, oligomers and polymers of ethylene glycol and/or propylene glycol, and triisopropanolamine; (c) dry grinding the calcium carbonate-containing material in a mixture comprising: (i) the calcium carbonate-containing material provided in step (a); and (ii) the at least one agent provided in step (b) in at least one grinding unit to obtain a dry ground calcium carbonate-containing material; (d) classifying the dry ground calcium carbonate-containing material of step (c) to obtain one or more coarse fractions and one or more fine fractions, wherein one or more of the coarse fractions are removed and/or subjected to dry grinding step (c) and/or subjected to classifying step (d); and (e) treating the calcium carbonate-containing material before and/or during and/or after step (c) with at least one monosubstituted succinic anhydride and, optionally, with at least one monosubstituted succinic acid and/or salts thereof to obtain a calcium carbonate-containing material having a treatment layer on at least part of the surface of said material; wherein the total amount of the at least one agent provided in step (b) ranges from 0.01 to 5.0 wt.-%, based on the total dry weight of the calcium carbonate-containing material provided in step (a); the total moisture content in the mixture of step (c) is less than or equal to 5.0 wt.-%, based on the total weight of said mixture; the total amount of the at least one monosubstituted succinic anhydride and the optional at least one monosubstituted succinic acid and/or salts thereof in step (e) ranges from 0.01 to 5.0 wt.-%, based on the total dry weight of the calcium carbonate-containing material provided in step (a); and the temperature in step (e) is adjusted to at least 2°C above the melting point of the at least one monosubstituted succinic anhydride. (a) providing a calcium carbonate-containing material; (b) providing at least one agent being a polyol selected from the group consisting of saccharides, glycerol, polyglycerol, ethylene glycol, propylene glycol, oligomers and polymers of ethylene glycol and/or propylene glycol, and triisopropanolamine; (c) dry grinding the calcium carbonate-containing material in a mixture comprising: (i) the calcium carbonate-containing material provided in step (a); and (ii) the at least one agent provided in step (b) in at least one grinding unit to obtain a dry ground calcium carbonate-containing material; (i) the calcium carbonate-containing material provided in step (a); and (ii) the at least one agent provided in step (b) in at least one grinding unit to obtain a dry ground calcium carbonate-containing material; (d) classifying the dry ground calcium carbonate-containing material of step (c) to obtain one or more coarse fractions and one or more fine fractions, wherein one or more of the coarse fractions are removed and/or subjected to dry grinding step (c) and/or subjected to classifying step (d); and (e) treating the calcium carbonate-containing material before and/or during and/or after step (c) with at least one monosubstituted succinic anhydride and, optionally, with at least one monosubstituted succinic acid and/or salts thereof to obtain a calcium carbonate-containing material having a treatment layer on at least part of the surface of said material;