Request InfoLapmaster Wolters Ltd.Lapmaster International's new premixed slurries are available in two configurations for optical materials processing applications. Type A is a ready-to-use oil- or water-based mixture with a standard concentration of 16 oz of abrasive to 1 gal of vehicle. Type B, which requires the company's pumping system, is a fully suspended gelatinous oil- or water-based concentrate. 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