prov:value
| - The particles or powders may be composed of materials such as calcium carbonate (CaCO3, e.g. from aragonite, calcite, chalk, limestone, marble or oyster shells), mica or other minerals, polyamides, polyesters, acetals, acrylic resins (including polymers and copolymers of acrylic acid, methacrylates, acrylic esters an acrylonitrile), nylons, glass particles (including silica), soda ash or lime, sol
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