Matsumi provides abrasive materials tailored to customer needs.

Our WA fine powder is a high-purity white alumina abrasive, produced by crushing and sizing premium fused alumina. It is composed of alpha-type (α-Al2O3) corundum crystals with an Al2O3 purity of 98.0% or higher.

Ranking second only to silicon carbide in hardness, WA is a versatile fine powder renowned for its sharp particle size distribution and stable grain shape. It delivers exceptional performance as a raw material for super-finishing grinding stons, precision coated abrasives, and high-end polishing tapes.

The WA series is optimally suited for the precision lapping of low tensile strength metals, glass, quartz, and semiconductor crystals. Furthermore, its high-purity characteristics make it an excellent choice for functional fillers in advanced composite materials.