Bathtubs are made from industrial stone materials, giving them an elegant luxurious appearance. They are an excellent choice for many people who prefer natural aesthetics. They are crafted from calcium carbonate powder or aluminum hydroxide powder, using a gel layer as a surface layer and multiple stacked and layered composite materials. The surface is rich in convex and concave materials that mimic natural stones. Due to the high-density fibers in the composite material, it is very strong, and the surface is scratch-resistant.