In production, multiple green bodies can be produced by one molding, and each mold core is marked with different English letters to distinguish it, which is called the mold number by the insiders. Don't pay attention to anything, just like the production batch number on the back of your drink.
The use range of Grade A is not limited, and it can be used in various places for home decoration. Therefore, the environmental protection performance of indoor floor tiles must meet the A-level standard. Class B decoration materials refer to materials that do not meet the requirements of Class A decoration materials, but need to meet the requirements of IRa≤ 1.3 and Ir≤ 1.9 at the same time.