Topocean is specializing in particle board manufacturing! The F☆☆☆☆ (F4 star) Certified particle board produced by the factory is a best-selling product exported to Japan. This product meets the Japanese F-star certification. The F four-star standard certification is the highest of the four levels of the Japanese "F-series" standard. The limit value of formaldehyde release is 0.3 mg / L, which is higher than the E0 standard of 0.5 mg / L. The core lies in the content and release standard of formaldehyde.