1、Transmittance detection (key focus on clarity and purity)
Detection method
Lift the tempered film flat and aim it at the sun or strong light source, and visually observe the overall transparency of the film with the naked eye.
High quality standards
The film surface has no small white spots, bubbles, impurities, or misty texture, and the light transmittance can reach about 95%. Objects can be seen clearly through the film without deviation or color distortion.
Poor performance
There are small white spots, impurities, or poor overall transparency, gray and foggy on the membrane surface. When observed through the membrane, the image may appear blurry and the color may shift.
Core impact
Tempered film with poor light transmittance can increase the visual burden on the eyes, and long-term use can easily lead to eye fatigue, dryness, and affect the user experience.
2、Scratch resistance test (with a focus on verifying hardness and wear resistance)
test tool
Choose commonly used hard and sharp objects in daily life, such as blades, scissors, keys, wire, etc.
test method
Gently scratch the surface of the tempered film with a tool (it is recommended to choose the area where the edges and corners do not affect the core use), with the force based on the friction strength that may be encountered in daily use, without the need for deliberate pressure.
High quality standards
After scratching, there are no scratches or traces left on the surface of the film, and the surface of the film is intact and does not affect its normal use in the future.
Poor performance
After scratching with soft and hard objects such as iron wire, obvious scratches may appear on the film surface, and there may even be damage or detachment of the film layer (which is a common problem with ordinary high-definition films).
core principle
High quality tempered film has undergone special hardness treatment, and its surface hardness can resist the friction of sharp objects in daily life, while inferior or ordinary films lack relevant processes and have insufficient hardness.
3、Anti fingerprint oil contamination detection (verifying surface coating effect)
Detection method
Drop 3-5 drops of clean water on the surface of the tempered film, observe the state of the water droplets, then gently shake the film surface and observe the residual situation after the water droplets flow; You can also directly press your fingers on the film surface to observe the degree of fingerprint residue.
High quality standards
Water droplets on the membrane surface will condense into water droplets, which will not disperse or permeate. When shaken, the water droplets can roll smoothly like mercury without any adhesion, and there are no water marks left on the membrane surface after rolling; After pressing with your fingers, the fingerprint imprint is extremely faint, and it can be completely removed by gently wiping.
Poor performance
After the water droplet drops, it quickly disperses and spreads evenly on the membrane surface, leaving obvious water marks after shaking; After pressing with fingers, the fingerprint remains clear and difficult to wipe clean. Long term use can easily accumulate oil stains, affecting the cleanliness and appearance of the film surface.
Core strengths
Tempered film with good anti fingerprint and oil stains effect usually has a hydrophobic coating on the surface, which can reduce the adhesion of fingerprints and oil stains in daily use, make it easier to clean, and keep the film surface clean.
