UPPER GLAZE LAYER COMPOSITION FOR SANITARY EARTHENWARE, AND SANITARY EARTHENWARE

摘要

To provide an upper glaze layer composition for sanitary earthenware capable of reducing the number of surface defects of a sanitary earthenware, and the sanitary earthenware.SOLUTION: There is provided an upper glaze layer composition for sanitary earthenware, which is a slurry with a glaze raw material dispersed in water, and in which a second melting temperature measured by the following measurement method 1-1 is 850 to 1150°C. Measurement Method 1-1 A DTA curve is calculated by using an alumina powder as a reference material, and a dried article of the upper glaze layer composition for sanitary earthenware as a test powder, a temperature of the reference material at a first inflection point where potential difference ΔV exhibiting a value ΔT by reducing a temperature of the reference material from a temperature of the sample powder in a range of over 700°C of the DTA curve becomes small is set as a first melting temperature, and a temperature of the reference material at a first inflection point where the potential difference ΔV in a range of a higher temperature side than the first melting temperature becomes large is set as the second melting temperature.SELECTED DRAWING: None