Paint with aluminum powder (also called silver powder) is scaly particles, it is for this scaly particles state, aluminium powder with metallic and shielding function. Metal aluminium industrial production has a long time ago, in the early production mode is pounding method and pounded the aluminium scraps on impact machine of the slots, pestles under mechanical drive continuous play the slots of aluminum, is malleable aluminum under the impact of gradually into thin slices and crushing, screening after aluminum became very little tiny, as a product meets the requirements of aluminum powder. Dao method production efficiency is low, the quality of the product is not easy to master, and dust during production, very easy to fire and explosion. In 1894, German Hamtag with ball mill production of aluminum powder, put the ball in the ball mill, aluminum scrap and lubricant, make use of the flying ball break after becoming flaky aluminum powder of aluminum, in ball mill and pipe filled with inert gases, this method is still in use, called "dry process production. In 1910, the United States, J.H all invented to join oil solvent instead of inert gas inside the ball mill, the production of aluminum powder and solvent composite slurry, paste aluminium powder pigment. This method is simple in equipment, process safety, product very convenient, quickly adapted for use by countries around the world. Most modern aluminium powder pigment is using this method, this method is also called the "wet".
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