FIELD: bulk dyeing of building materials and products made from them. SUBSTANCE: proposed formulation has following composition, wt.%: water glass 0.5, pigment 25-60, sodium pyrophosphate 0.005-0.3, water being balance. Optionally, formulation may comprise pH adjusting agent in amount 0.1-5.0 wt. %. EFFECT: 1) proposed formulation represents stable dispersion; 2) it can be used for dyeing wider range of products. 2 cl, 2 tbl
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