LUSTRELESS BLACK TILE GLASE

摘要

FIELD: chemistry. ^ SUBSTANCE: invention relates to glase compositions for applying on ceramic tiles. The lustreless black tile glase contains the following components in pts. wt: clay 4-6; quartz sand 56-57; chalk 6-10; iron oxide 2-3; pyrolusite 20-22; apatite 3-4; fluorspar 3-4. ^ EFFECT: low toxicity of glase and stronger bond between the glase and the tile surface. ^ 1 tbl