Ⅰ. Introduction:

Black polyolefin plastic sheet is the test substrate specified in GB/T 9780-2013 "Test method for stain resistance of architectural coatings", which will soon replace the asbestos-free cement pressure plate used for washing resistance test of architectural coatings. Smooth matte surface, no plasticizer. In a typical scrub test, the coating is coated on the scrub test piece with a specific thickness, and then scrubbed with a scrub tester after drying. 

Ⅱ. Documents: