AD black
Color code: AD-408B
This slate is good quality that passed GB/T 18600-2009, ASTM, BS EN 12326-1-2004. It has following characters
--smooth surface
--nice color
--non-fading
--durable. Our absorption is 0.18%, much lower than GB/T R1 grade 0.25% and ASTM 0.25%. Abrasion resistance is 0.016mm that is much lower than GB/T 0.35mm and ASTM 0.38mm.

Size:
mackerel scale

Thickness:
5-7mm, 6-8mm,7-9mm

Output is 300,000 square meter high-quality roofing slate and 100,000 square meter floor slate every year. We plan to take over concession of 10 quarries and expand processing capacity at the same time so that the annual output of high-quality slate can reach 1000,000 square meter in order to meet the needs of international and domestic clients.