Whiteness Meter based on the principle of photoelectric effect & D65 light source (R457) as a illumination condition. Meanwhile except solution or liquid samples, this instrument can be widely used for measuring the whiteness value of any substances Such as: powder, board, paper, paste, sheet, clay etc. This instrument is used widely for measuring the whiteness value of any substances such as powder, board, paper, plastic, sheet, toothpaste, fabric etc.