TThe main raw materials of coal-based spherical activated carbon are various wood chips, coconut shells or pitch. The raw materials are relatively wide, spherical in shape, roughly gray-black in color, odorless, and of course non-toxic. The production pro
All the pictures on the coffin use techniques such as powder-setting and gilding, as well as the blending of pigments, to fully incorporate the ancient Tang Sancai painting style into it