The ISO 13803:2014 standard provides a method for determining coating haze for haze measurement of textured coatings on flat, opaque substrates. This standard is closely related to the 20 ° gloss measurement method in ISO 2813 and is mainly used for the evaluation of high Gloss surfaces. Measurement of the intensity of diffused light on the coated surface next to the mirror reflection direction is carried out by using a Glossiness Meter with a 20 ° geometric angle to calculate the haze value. The low high of the haze value directly reflects the smoothness and clarity of the coated surface, helping to distinguish differences between high Gloss surfaces.