Whiteness Tester 1)can test powder,pasty,boards,paper/sheet,clump etc; 2)LCD Display; 3) ... Meter, Incubator, shaker, Hotplate, Mixer, PCR, Oven, etc. Whiteness Tester Application:This instrument based on the principle of photoelectric effect & D65 light ... solution or liquid samples, this instrument can bewidely measured the whiteness value of any substances. Such as:powder, board, paper, paste, sheet ...