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polishingslurry on 16 Dec 24A-Plane Sapphire Colloidal Silica Kona series Sapphire Polishing Slurry developed for kinds of Sapphire products, such as sapphire lens and sapphire substrate. Our Colloidal silica provide a good surface finish with no compromise with polish rate, and alumina slurry especially suitable for C-plane sapphire with a fast removal rate and controlled surface finish.