Characters and features :Black powders,escellent tinting strength and covering capacity,also good at resistance to light and atmosphere,alkali resistant,without water and oil perjmeability,no acid resistance,dissolved in hot string acid .

• 性状特点：黑色粉末，着色力和遮盖力都很好，耐光和耐大气性亦好，耐光性良好，耐碱无水渗和油渗性，不耐酸，溶于热的强酸中。