... SpecificationsWhiteness meter except solution or liquid samples, others all can test, such as: powder, board, paper, paste, sheet, clay,etc. ... (powder), Salt (powder), Sugar (powder), Fish Balls (paste),etc² Paper making industry: Paper Factory (paper/sheet), Printing Factory (paper/sheet), Publishing ... Digital Whiteness Meter (0-100%,LED display, touch panel, test paper, rice, flour, powder, paste)