... liquid samples, others all can test, such as: powder, board, paper, paste, sheet, clay,etc.A & E Lab. Main ... the whiteness value of any substances. Such as: powder, board, paper, paste, sheet, clay, etc.² Chemical & Building materials ... ), Plastic (boards), Steel Plate (boards), Ceramics (powder), Gypsum (powder), Wallpaper (paper/sheet), Porcelain Enamel (powder), Calcium Carbonate (powder),etc.² ...