Guangzhou Shounuo Scientific Instrument Co., Ltd. ZB whiteness meter is a special instrument for measuring the whiteness of objects. ① It can measure ISO whiteness (i.e. R457 whiteness). For fluorescently whitened samples, it can also measure the fluorescent whitening degree produced by the emission of fluorescent substances. ② Determination of brightness stimulation value. ③ Determination of opacity. ④ Determination of transparency. ⑤ Determination of light scattering. Coefficient and absorption coefficient ⑥ measure the ink absorption value. Widely used in whiteness measurement of paper and cardboard, textile printing and dyeing, paints and coatings, chemical building materials, plastic products, cement, calcium carbonate powder, ceramics, enamel, porcelain clay, talc, starch, flour, salt, detergents, cosmetics and other objects.