Experiment with gloss meter to 20 °, 60 ° and 85 ° of the measured geometry of the mirror gloss coating.Which applies to all 60 ° gloss range of coating, but the high gloss coating or matte coating close to, 20 ° or 85 ° rule method is more appropriate.20 ° high-gloss coating method can improve the ability to identify, for 60 ° gloss greater than 70 units of coating; 85 ° for low gloss coating method can improve the ability to identify, for 60 ° gloss less than 30 unitscoating.This test method is not suitable for the determination of metallic gloss paint coating.Gloss meter used in this study and received by the light part of the components.Light by the lens to become parallel or slightly convergent beam fired at the coating surface, the reflected light converged by the receiving part of the lens, the light field diaphragm to be absorbed by the battery, then the receiver measuring instruments measured values.Receiver gauges measured value and the receiver field of view through the optical flux is proportional to the column.Gloss using this test method, used in the sample must be flat and good surface coating, if the substrate is slightly bent or local level will not seriously affect the measurement results.In addition, the specimen thickness must comply with the requirements, leveling the surface should be inspected with the same product, the surface must be clean and not touch the surface of the subjects, because these factors will impact on the determination results.Gloss meter in addition to the existing provisions of more than 20 °, 60 ° and 85 ° geometry of the optical path, but some devices also use 45 ° and 75 ° angle to determine the geometry of the product such as the outer surface of the mirror sheen. Determination of specular gloss, you should choose the appropriate measurement geometry. |
