Two reasons for discoloration of plywood surface

The discoloration of the plywood surface refers to the abnormal color of the board surface due to contamination. If the plywood is not stored properly, it may discolor, directly affecting the quality and service life of the board. Color pollution on the board surface has always been a concern for manufacturers and technicians.
There are various ways of surface color pollution, which can be basically attributed to fungal discoloration and chemical discoloration, with iron ion pollution being the most common chemical discoloration. Fungal discoloration is mainly caused by fungal contamination of sliced plywood logs during storage. Fungi grow and develop longitudinally along the vessels of logs under suitable temperature and humidity conditions, while logs heavily contaminated with fungi may exhibit discoloration and decay. Iron ion pollution is caused by the color reaction of tannins contained in logs when they encounter iron ions, forming a blue black pollution on the surface of the wood.
The above are the reasons for the discoloration of the plywood surface.