Calcium Carbonate Powder Best Calcium carbonate manufacturer in vietnam Best Calcium Carbonate white marble stone mines of Vietnam lie in its northern provinces with highest concentration in Yen Bai . Uncoated Calcium Carbonate Powder(CaCo3) are used as input materials and ingredients in terms of base material and filler for various industries and industrial applications, Products manufactured by modern germany machine Specification: CaCo3: 98.5% Whitness: 98.5% Brightness: 96.5% Particle size: Mastersizer 2000/D50: 5 micron, 6 micron, ...or as per customer required