... viscosity of glaze in ceramic industry.ItemIndexPbO2 Content,% ≥33.9Pb3O4 Content,%≥97.0Total Pb3O4 and PbO Content,%≥99Volatile Matter at 105 (%,m/m ... ) ≤0.75Sedimentation Dimension, mL≥30Nitric Acid Nonsoluble Matter,%≤0.1Fe2O3 Content, %≤0.003CuO, %≤0.002Particle sizes2.0-1.7mm,%≤2.01 ...