ENGOBE Russian patent published in 2013 - IPC C04B33/14 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of engobes, which can be applied in production of articles of building ceramics (bricks, tiles, etc.). Engobe includes white-burning clay, milled broken window sheet glass, colouring additive, milled quartz sand and sulfite-alcohol mash with the following component ratio, wt %: white-burning clay - 78.0-82.8; milled broken window sheet glass - 7.0-9.0; colouring additive - 0.5-5.0; milled quartz sand - 7.0-9.0; sulfite-alcohol mash - 0.8-1.2.

EFFECT: increase of engobe frost resistance.

1 tbl