Iron sheet oxidization Red
The iron sheet reacts with nitric acid at high temperature to produce iron oxide red crystal seed. The crystal seed solution is put into a two-step oxidation barrel for oxidation. The iron sheet is added and the temperature rises.
Iron sheet oxidization Yellow
Sulfuric acid reacts with iron scraps to produce ferrous sulfate, and then ferrous sulfate and iron scraps are added into the crystal nucleus suspension, and then iron oxide yellow is prepared by air oxidation, rinsing, drying and grinding
Composite iron green
It is composed of phthalocyanine blue and iron yellow, plus filler and auxiliaries