Aluminum is silver gray metal, which is suitable for pigment. Aluminum slurry is a mixture of pigment aluminum powder and solvent. Its use and characteristics are similar to aluminum powder. Due to its mass of 26.98, relative density of 2.55, purity of 99.5%, melting point of 685 ℃, boiling point of 2065 ℃, melting latent heat of 323kj / g, aluminum is reductive, easy to oxidize and exothermic in the oxidation process. Aluminum is a ductile metal and easy to process. The oxide film on the surface of aluminum is transparent and has good chemical stability.