... characteristics comparison with other boards 5) This product has special surface texture and uncial feelings, natural, elegant, which can be ... 101 density 1,200kg/cbm 13) Surface water resistance: no change within 96 hours 14) Surface alkali fastness: no change within ... 48 hours 15) Surface washing fastness: ≥5,000 times 16) Surface aging resistance: no change within 1000 hours ...