The ISO 8254-3:2016 standard specifies a Measuring method for paper and Cardboard specular gloss using the TAPPI method of 20 ° convergent beam of light. This method is suitable for high Gloss surfaces such as cast coatings, scratch or wax treated paper and Cardboard, and materials such as high Gloss inks film. The test quantifies Glossiness by the intensity of ray of light reflection at specific angles, and the results are expressed in Gloss Value. This standard provides a unified test procedure for surface Gloss evaluation of paper and Cardboard, which is widely used in quality control, product development and international trade to help users better understand the surface characteristics of materials.