... size High Brighthness Low Ferrous Washed Kaolin Clay Powder for Paper GRPY-1 As a result of its pore structure, this series ... .Fine particle size Features and Applications GRPY-1 high brightness, high viscous consistency, use for paper coat.GRPY-2A high brightness, fine ... particle size, use for paper coat and bottom coat.GRPG-1 high brightness, fine particle size, use for ...