It is a high quality acid resistance black frit, one coat one fire, can be applied to enamel cookware / gas stove / bbq. compound direct on frit it is a mixed black frit, can be applied to enamel cookware / gas stove / bbq. Du2019andrea (1960) describes a vitreous enamel resistor composition that may be applied to and fired on a ceramic body to produce an electrical resistor. the composition consists of fine powders of pd 4u201350%; ag 0u201340% and flux (frit or frit plus bi 2 o 3 and pbo) 50u201392%. 1 milling additon ratio for cast-iron black enamel: frit 100 clay 5-7 quartz powder 0-5 borax 0.5-0.8 sodium nitrite 0.2 black pigment 2-5 water 50-55 ml note: adding 10-20% quartz powder in acid resistant black enamel frit slurry fineness 0.5-1.0g/150mesh. Good adhesion ground coat porcelain enamel frit glaze for enamel mug / cup / sign / cookware , find complete details about good adhesion ground coat porcelain enamel frit glaze for enamel mug / cup / sign / cookware,porcelain enamel frit,ground coat enamel frits,enamel frit glaze from other inorganic chemicals supplier or manufacturer-hunan noli enamel co., ltd.