Black roofing slate are from natural slate. They are of best quality stone.More detail are as follows:
Color : Black (Dark Gray)
Remarks : This slate is with good quality that passed SDTM and BS680 standard .It has following characteristics
A little bit rough surface
Nice color
Non-fading
Durable
Output : 6 containers each month
Regular size : 600X300mm (24″X12″)
500X250mm(20″X10″)
400X250mm(16″X10″)
Thickness :5-7mm 6-8mm 7-9mm
Transport : 50kilometers from factory to Jiujiang Port
Physical Property Testing Result
Tests | Slate |
Water Absorption(%) | 1.83 |
Compressive Strength (MPa) | 69.1 |
Acid-proof(%) | 99.76 |
Alkali-proof(%) | 99.78 |
black roofing slate