Calcium Carbonate Masterbatches: Sivalene | Sivathene | Sivarene Calcium Carbonate Masterbatdhes are made out ultrafine calcium carbonate powders. Also the Calcium Carbonate Used is coated. Our All calcium Carbonate Masterbactches are very much suitable for food grade packaging application. Also the mineral powder used is very soft. Softer Calcium Carbonate particles used ensure minimum wearandtear of the screw & barrel.