... (30um Screened Residue),%≤0.10.150.20.3Impurity(Copared with Sample)sampleAsampleBsampleB Partical Diameter Less than 10um,% ≥989897 ... such as narrow distribution of particle diameter, thin painting membrane, even surface, and good light reflection etc. II category ... : specification 25Kg/sack, the inner layer is plastic membrane tied with thread, the outer layer is plastic woven sack sewed ...