Chemical iron powder

The iron elemental content of chemical iron powder is: 85-95% : 

Mainly used in titanium white powder chemical industry, with the content of 85-95%; 30-200 mesh adjustable.

Iron powder for sewage treatment: mainly used in electroplating, leather making, papermaking, dyeing and finishing chemical ceramics and other industries, with the content of 75-90% and adjustable 30-200 mesh.

Pure metal iron is silver-white, while iron powder is dark color. This is an optical problem. Due to the small specific surface area of iron powder, there is no fixed geometric shape, while the crystal structure of iron block is geometric, so the iron block absorbs visible light from one part and reflects the visible light from another part, showing white color.Iron powder does not absorb all the light is diffuse reflection, can enter the human eye less visible light, so it is dark color.