Lime powder, commonly known as white ash powder, can condense and harden after adding water, and has a cementing effect on other substances. It is widely used in the main construction process and chemical industry. The quality of lime powder is generally identified from several aspects such as product packaging, color, fineness, moisture, and volume stability. From the perspective of product packaging, lime powder produced by regular lime factories is packed in plastic woven bags that comply with relevant standards. The specifications and grades of the packaging bags are consistent. After filling with lime powder, the weight deviation of each bag is generally not more than 0.5 kg; the packaging bags are shipped to the factory. The name, factory address, product name, trademark, grade, net weight, product standard number and production date should be clearly marked. The lime powder produced by informal lime factories generally uses recycled plastic flour bags and cement bags. Due to inconsistent packaging bag specifications, the filling weight of each bag of lime powder varies from one to several kilograms. Judging from the color, lime powder is white powder. Observed with the naked eye, dolomitic lime powder is relatively natural, bright white in color, and has a strong dazzling effect; magnesia lime powder is clear white in color, relatively dazzling; calcareous lime powder is yellowish in color, black in color, and has a strong dazzling effect. Poor. The higher the whiteness and stronger gloss, the better the quality of lime powder.