The pine bark that has grown for many years is very thick, with a brown color and uniform size and thickness, with an average thickness of more than 2 centimeters. It looks like pebbles, has a smooth surface, clear patterns, and is beautiful and generous. The densest part of the material is the raw material, which is a high-quality covering made through processes such as crushing, grading, sun drying, and polishing. Polishing type coverings not only have all the advantages of ordinary coverings, but also have high ornamental value like handicrafts. Moreover, the material is thick and has a lon