
1) Ceramic material
Found on
https://www.crosswordclues.com/clue/ceramic-flux

A ceramic flux functions by promoting glass formation in clay bodies and glazes. Fluxes are used in glazes to lower the high melting point of silica. The most commonly used fluxes in a ceramic glaze are lead, boric, soda, potassium, lithium, calcium, magnesium, barium, zinc and strontium. These are introduced to the raw glaze as compounds, for exa...
Found on
http://en.wikipedia.org/wiki/Ceramic_flux
No exact match found.