Item # 125-OP, Optical Powder

K.C. Abrasive’s Optical Powders are manufactured to exacting specifications for wholesale ophthalmic and precision lens industries. Our Optical Powders feature a blocky, angular shaped crystal for consistent stock removal and a narrow particle size distribution to assure a uniform surface finish.

*All items below are available with suspension additives for oil (T) or water (ST)
Product NameOptical Powder
Item #125-OP
Nominal Median Size (um)12.5
Physical FormBlocky, Solid, Angular
Melting Temperature2000C (3632F)
Density3.8 g/cm^3
Hardness - Knoop Scale2050
Hardness - Mohs Scale9
Water SolubilityInsoluble
ColorLight Brown, Tan
Typical Chemical Analysis
Al2O3 (by difference) 96.05%
TiO2 2.70%
SiO2 0.70%
Fe2O3 0.10%
CaO 0.15%
MgO 0.30%
CrystallographyAlpha alumina, hexagonal crystal
ShapeBlocky with sharp edges
Bulk Density2.17-1.61 gm/cc depending on size
Shelf LifeIndefinite
Specific gravity (g/cm3)3.92

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