Porcelain enamel coating services enamel easy to clean ETC powder

Pre-grinding black enamel powder which fineness is 30 mesh. There would be 25-30g residue when 100g powder is passed through 140 mesh standard sieve. The coating made of such product has smooth surface, fine adherence, good stability and appropriate glossy could be obtained when firing temperature & time is controlled well. APPROVABLE STANDARD: a. Appearance: black powder. The coating is the same as standard which is smooth and without bubble mark. b. Firing temperature: 830--850℃ c. Adherence: Grade 1 -2 d. Glossy: standard ≤±5 e. Fineness: 30 mesh; There would be 25-30g residue when 100g powder is passed through 140 mesh standard sieve. TEST METHOD: 1) Mill the powder with water by ball mill for 6~8 minutes until the fineness becomes 0.5-1g/100ml.150 mesh. 2)Pass it through 80 mesh sieve and make the consistency to be 165~170g/100ml,(1.65~1.7g/cm3). Compare it with standard samples. 3) Cover 100-140 micron such enamel on a sheet steel (thickness 0.8~1.0mmⅹwidth 100mmⅹlength 100mm) and fire them at 830-850℃ for 2~3 minutes. NOTE: The thickness of glaze slip, fineness of powder, firing temperature & time should be adjusted and controlled very well to get a good coating gloss.