... exempt ultraviolet, ozone, the harmful effects of water and chemicals. 5),Through the "double 85", 1,000 hours of physical ... and mechanical performance and anti-yellowing determination, the "double 85" means the ... ,Main performance NoItemsTechnique Request1Exteriorwhite2Specific gravity 23°C1.35~1.403Tack free time MIN7~154Hardness JIS A25~405Elongation ...