MicronCarb® Series by 20 Microns is a natural calcium carbonate. It is developed for paints-coatings. The unique particle size – distribution optimizes particle packing leaving less void space to be filled by expensive resin. MicronCarb® Series is a grade name of the calcium carbonate series. Calcium carbonate or calcium carbonate powder is a chemical compound, with the chemical formula CaCO<sub>3</sub>. Pure calcium carbonate can be produced from a pure quarried source (usually marble) or it can be prepared by passing carbon dioxide into a solution of calcium hydroxide.