Material for the plywood defects which
Primary rot incipient decay The erosion of the fungus by the growth of the fungus causes a slight change in its chemical composition (usually before drying), showing slight changes in the hardness and discoloration, resulting in changes in the nature of the wood.
Decay rot due to the invasion of wood rot fungi, the cell wall material decomposition, resulting in loose wood, strength and density decreased, wood tissue and color are often changing.
spotted flecks streaks system wood fungus invasion of wood early formation, often see brown. Tan or purple stains.
false heartwood heartwood sound wood center part of the color is different from the normal wood, often dark brown or reddish-brown, usually its density and hardness are relatively large.
