Calcium Carbonate Powder"Greenway Biotech Brand" Paint Additive Limestone Powder Rock Dust Very Fine Powder 20 Pounds 20 Pounds of Greenway Biotech Calcium Carbonate Powder - Limestone Powder Paint Additive - Great to Make Your Own Chalky Paint (DIY) Very Fine Powder (Mesh 200) Mixes Well with Latex Paint to Get Smooth, Clean, and Vintage Look Due to Its White Color It Wont Effect the Color of Latex Paint to Make Your Desire Chalky Paint Color