What is the color of Chromite flour 325mesh 400mesh 600mesh 800mesh?

What is the color of Chromite flour 325mesh 400mesh 600mesh 800mesh?

Chromite flour is made by crushing and grinding natural iron chromite ore, which has a glossy black color. After grinding, more chromium and iron elements in the chrome ore are released, which has a significant impact on the color.
Firstly, the color of chromium metal and chromium oxide turns green. When chromium ore is ground to 325mesh -400 mesh, the color of chromite powder will turn dark green.
Then, chromite is finely ground to 600mesh-800 mesh. The released iron oxide in the powder oxidizes upon contact with air, resulting in a darker reddish black color of the chromite powder.
Therefore, the finer the Iron Chromite flour of 400mesh -800 mesh, the redder the color of its black material.

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