How to identify product quality

COLOR 

Most insulation film are chosen shallow green, sky blue, gray, brown, natural color of eye color more comfortable. And with a metal sputtering process, the gold, silver, titanium and other high-level metal coated in a natural rubber membrane, does not appear to fade, fade phenomenon. From the exterior, soft-proof membrane uniform color, no wave uneven shades of color, from the inside looking out natural scenery does not change color. The film is a common color in the color film in direct financing, after tearing the upper plastic sheet, forced shaving stick surface, there will be the color off. In addition, ordinary color film holding gently wipe the floor, there will be fading phenomenon.

ODOR 

Residual solvent layer inferior film, the benzene content, there will be odor, and good environmental choice grade film coatings for food packaging materials in manufacturing, and after a professional treatment, odor small. Experts warned that prolonged smell this odor, it will seriously affect the health of the owner.

INDEX 

The so-called proof membrane, must have insulation, explosion-proof, anti-ultraviolet and other effects. Therefore, consumers choose, you can consult the relevant circumstances in detail to the sales staff, thereby determining the genuineness and quality is good or bad. Accordance with the general standards of proof membrane heat rate should reach about 90% UV blocking rate is generally not less than 98% of high-grade not less than 99%. The haze, high-quality film can be less than 2%, and regardless of the color depth, clarity are very high, consumers in the selection, you can afar through proof membrane, the effect is very vague inferior products. On proof performance, quality proof membrane made of special polyester film as the substrate, the film itself has a strong toughness, under normal use, the protective film can easily be scratched face, broken glass can film after cement, and not splash wounding. Shelf life, the regular manufacturers of film has a longer warranty period, usually five years.

FEELING 

General safety explosion-proof film thickness of not less than 2mil, it feels solid feel smooth. Further, because of its Surface hardened, generally will not scratch the surface. Because ordinary color film thickness is not enough, feel thin and brittle, In the process of shaking the glass will leave marks on the film path.