The appearance of different depths and sizes on the surface of the paint film, which looks like cracks on the back and back, is called cracking. Waterway is also called waterway. Some cracks are not easy to find without careful observation. The reasons for cracks are:
(1) The main reason for cracks is that the lacquer itself has a high moisture content, or the lacquer has been mixed with water, and the lacquer has not been brushed sufficiently. Severe cases will produce deep cracks, and the paint film will be as rough as pine bark, and then lose adhesion and peel off.
(2) Construction in wet weather, combined with insufficient brushing and impure moisture, generally prone to waterways. As long as you pay attention to the construction conditions and operate carefully, you can overcome this disadvantage.
(3) If the topcoat is too thick to be brushed, it will also form small water veins.
