prov:value
| - These include, for example, fillers, such as quartz powder, quartz sand, highly dispersed silica, heavy spar, calcium carbonate, chalk, dolomite or talc, which are often used together with suitable wetting agents such as polyphosphates, for example, such as sodium hexametaphosphate, naphthalenesulfonic acid, ammonium or sodium salts of polyacrylic acids, the wetting agents being added generally in
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