... in summer, it can resist 90% of infrared light , and lower indoor temperature 5 C ~ 7 C, ... ~ 40%. But in winter, it can block infrared light out, so that increase the indoor temperature ... (168h,diluted hydrochloric acid)no surface layer and wrinkle defect, no bubblingArtificial aging resistance(1000h ... )no color difference, no surface layer and wrinkle defect, no bubbling, no significant performance ...