2. The datum plane stipulates that the installation requirements of matte aluminum gusset plate are low, while the requirements of smooth aluminum gusset plate are high and the flatness is not good, which is very easy to observe.
3. The smoothness of matte board is obviously less than that of bright board, and the matte paint surface is mild and foggy; The bright finish is as bright as a mirror, sparkling, and the bright surface is used in a well-lit living room, and the balcony light area is easy to give people a sense of dizziness.