Flake Alumina means a form to have wide, flat and slice thickness. It is being used for industry area that includes various abrasive and filler because it has an excellent character such as chemical resistance, durability of abrasion, electric insulation, thermal stability, high hardness and great mechanical hardness.

Flake Alumina is very as an excellent pearl pigment to have characters such as transparent, high temperature thermal stability and high mechanical hardness.

Because Flake Alumina improves its mechanical character that included metal or high molecular substance such as elastic modulus and toughness if Flake Alumina has nanosize, it is being used a filler.

It is widely being used an electronic material because Flake Alumina that has a high thermal conductivity also can remove the heat of electronic part fast.

It is widely being used for the industry area according to corrosion resistance and chemical stability.

Pearl pigment appears the unique colour because it has the different optical character such as multiple reflection of the light, scattering of light and interference phenomenon to compare with the general pigment.

General pigment appears the colour as reflecting all light on the surface or absorbing all light by optical character but pearl pigment causes interference that is α-Al₂O₃ of low refractive index and reflected light that some of light is reflected and penetrated at the TiO₂ layer of high refractive index.

It shows the unique pearl pigment to cause scattering of light and interference phenomenon through the refractive index difference.