The environmental protection grade of melamine board(MDF+LPL) is the European environmental protection standard. There are three grades in total, E0, E1 and E2 from high to low. And the corresponding formaldehyde limit grade is divided into E0, E1 and E2. For each kilogram of plate, the emission of E2 grade formaldehyde is less than or equal to 5 mg, E1 grade formaldehyde is less than or equal to 1.5 mg, and E0 grade formaldehyde is less than or equal to 0.5 mg. It can be seen that the grade of melamine board is environmental protection, and the one reaching E0 is the most environmentalprotection grade of melamine board.