1,Eye-observation clarity
The clarity of glass film is an important indicator to ensure the field of vision. Regardless of the color of the film, please pay attention to whether the outer contour of the item is clear through the film glass, the inferior film will have a foggy feeling and even cause the deformation of the outer contour of the item, and the high-quality film is very high regardless of the color and clarity, and there will never be a foggy phenomenon with unclear vision.
2,Sniff - tear off the inner lining to smell the smell
Inferior glass insulation film usually uses pressure-sensitive adhesive, which is not stable enough, poor quality, contains a large number of benzaldehyde molecules, and volatilizes to produce peculiar smell under sunlight, while the special heat insulation film has almost no taste.
3,Hand touch - touch
High-quality glass insulation film has a thick and smooth feeling to the touch, while low-quality glass insulation film is very soft and thin, lacks sufficient toughness, and is easy to wrinkle.
4,Eye-Look-Color
The clarity of the high-quality glass insulation film is very high, and the pigment of the high-quality film is evenly integrated in the film, which is durable, not easy to change color, and will not be discolored by the scraper during the pasting process. The color of the inferior film is in the adhesive adhesive that plays the role of adhesion, and the color falls off after tearing off the inner lining of the film with a fingernail.
5,Wipe with alcohol, gasoline, asphalt cleaner and other chemical agents
Because the inferior glass heat insulation film is only dyed by the adhesive layer, or only coated with ultraviolet blocking agent on the adhesive layer, the fading phenomenon can be seen by wiping the adhesive layer after removing the protective layer of the film, or testing with an instrument can find that the ultraviolet rays are greatly reduced.
6,Anti-scratch
If there is no protection of the anti-scratch layer, the film will be scratched by the tool, which will reduce the clarity of the film and seriously affect the service life of the film. You can use your fingernails to scrape back and forth on the glass film (non-lined surface) a few times, if you can easily scratch the scratches, then it must not be a good quality glass film.
7,Warranty period
The shelf life of architectural glass film is 10 years or more, and the shelf life of automobile glass film is 8 years or lifetime, which will vary according to specific products, but the difference should not be too large.
8,Technical Parameters
The parameters of general glass insulation film include light transmittance, ultraviolet barrier line rate, infrared barrier rate, total solar barrier rate, tensile strength, peel coefficient, Shading coefficient, internal and external reflectivity, explosion-proof coefficient, service life, etc., according to these parameters to determine the thermal insulation effect of glass insulation film, explosion-proof safety effect and price, etc.
9,Whether the outer packaging and information of the products sold have the detailed product model, address, telephone, website and bar code of the original manufacturer. In addition, it depends on whether the unified publicity logo of the original factory is used, and the authorized dealer can use all the publicity logos of the original factory, otherwise he will be held liable for infringement, and whether there is a valid authorized distribution certificate.
Of course, the above methods according to the specific situation to choose the appropriate method, in general, some professional parameters and the like still need to be solved with the cooperation of professionals, so for the interests of consumers and personal safety, it is recommended to go to a good reputation or brand franchise store, try not to go to a small general store or wholesale office. Because sometimes there are shoddy people, professional brands or big brand franchise stores have passed the national inspection and brand measurement, and they are to ensure the quality and accept the inspection of the state and relevant departments, so consumers should make careful decisions to ensure a healthy life.