The conditions for obtaining and the regularities of changing the color parameters of ceramic pigments in the system CaO-MgO-Al 2 O 3 -SiO 2 -Cr 2 O 3 . The main phase of such pigments is chrome garnet, which is formed with the direct participation of blast-furnace slag minerals. It has been shown that with an increase in the acidity of pigment mixtures by equimolecular replacement of free silicon dioxide in their composition with phosphorus (V) oxide, the purity and intensity of the green color of uvarovite pigments increase, and their firing temperature also decreases to 1100 ... 1150 & # 176; С
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