This product is special designed for lapping crystal, but also for lapping optical glass, ceramic and other hard and brittle materials. It is purple colour, transparent water-based liquid, weak alkaline, no formaldehyde and other toxic substances. This product can be used by being added to 5% ~ 30% of synthetic diamond powder or other abrasives. It has superior performances of higher lapping efficiency, better lubrication, stronger rust-proof ability, faster speed of conduct heat and easier clean, also it can extend working life of the workpiece. This product is used directly for lapping processes without adding water. It is the ideal companion to machining, lapping and polishing for precious stones and crystal. No drinking. Wash immediately with clear water if it contacts skin and eyes.