1st, moisture content<=14%
2nd, static bend degree >=24mpa >=75.8mpa
3th, angularity <= 1%
4th, thickness tolerance:ía0.5mm
5th, thickness expansion rate (72 hours normal temperature water immersion) <= 8%
Packing: inner pallets is wrapped with 0.2mm plastic bag, steel strip or pvc for strength, more than 3mm plywood, mdf or hard paper sheet covering all the sides, four edges sealed with waterproof paint.