... -269-1widely used in glass, ceramics, enamel, paint industryStatus: black or brownish black powder,insoluble in water And ethanol, soluble in acid ... woven bag,or according to requirement.Characters : Copper oxide is black to brown amorphous powder or crystalline particles (monoclinic crystals). Relative ... on sieve (150um ) ≤ ,%0.10Residue on sieve (300um ) ,≤ %0.10 cupric Oxide