To determine whether the surface treatment process of titanium sunglasses frame is proper, you can start from the following aspects:
Observation appearance
Color uniformity: Properly processed frames, the surface color should be uniform, there is no obvious color difference, color spots or different shades of color. For example, if the frame is black as a whole, then the black saturation of all parts should be the same, and there will be no gray in some places and blue in some places.
Gloss: Quality finish will give the frame a natural, soft and even shine. If the gloss is too dark, the coating may be too thin or the treatment is not in place; The gloss is too bright and unnatural, and the reflection is strong like a mirror, and the coating may be too thick or the process is faulty.
Defects: Carefully check the surface of the frame for bubbles, holes, scratches, cracks and other defects. These defects not only affect aesthetics, but may also reduce the durability and strength of the frame. Such as bubbles will make the coating locally thin, easy to fall off; Scratches may damage the integrity of the surface, resulting in easy intrusion of corrosive media.
Check wear resistance
Slight wiping: Gently wipe the surface of the frame with a clean soft cloth, and observe whether there is a fading, peeling phenomenon. If the cloth is stained with color after wiping, it indicates that the adhesion of the surface treatment is not good.
Fingernail stroke: Gently stroke the inconspicuous part of the frame with the fingernail, such as the inside of the mirror leg. If there are obvious scratches, and the color of the scratch is different from the surrounding, it may be that the surface treatment layer is thin or not hard enough. However, this method should pay attention to the strength to avoid damage to the frame.
Assessing corrosion resistance
Simulated sweat test: You can apply a small amount of artificial sweat (which can be purchased or prepared by yourself, and the main ingredients include water, salt, lactic acid, etc.) to the surface of the frame, and then leave it for a period of time (such as 24 hours) to observe the surface for signs of discoloration, rust, or corrosion. If such a phenomenon occurs, it indicates that the surface treatment process has insufficient protection against sweat.
Exposure to common chemicals: Some chemicals in daily life, such as perfume, hair spray, etc., may also have an impact on the surface of the frame. You can drop a small amount of this substance in the hidden area of the frame and observe whether there are adverse reactions after a period of time. But pay attention to clean it in time after the test, so as not to cause permanent damage to the frame.
Sense of touch
Smoothness: Touch the surface of the frame with your hand, and the frame should feel smooth and smooth without bumps, particles or burrs. If there is a rough feeling, it indicates that the surface treatment is not fine enough, which may affect the comfort of wearing, and long-term use may wear clothes or skin.
Corner treatment: Check the corners and interfaces of the frame, such as the connection between the mirror leg and the frame, around the screw hole, etc., these places should be polished smooth, without sharp edges or untreated clean burrs, otherwise it is easy to scratch the skin or hang the hair.
Post time: Apr-02-2025