What causes the paint on the surface of the water glass to begin to crack and fall off?

In my spare time, I usually crawl online to read posts. I also like to read e-commerce purchase reviews from peers to see what aspects do people pay more attention to when buying water bottles? Is it the insulation effect of the water cup? Or is it the function of a water cup? Or is it the appearance? After reading more, I found that the paint on the surface of many new water cups has begun to crack and peel off after being used for a short period of time. This is because the replacement conditions set by the current e-commerce platform shopping are generally 15 days at most. Consumers have just exceeded this period of purchase and use, and cannot return the goods. They have no choice but to express their bad emotions through comments. So what is the cause of cracking or peeling? Can it still be remedied?

At present, the surface of water cups made of various materials on the market is spray-painted (except for ceramic surfaces with colored glazes). Whether they are plastic, stainless steel, glass, etc., in fact, the surface paint of these water cups will also appear to be cracked or peeled off. The main reason is still due to factory process control.

Professionally speaking, each material requires different spray paints. There are high-temperature paints and low-temperature paints. Once there is a deviation in the water cup material corresponding to the paint, cracking or peeling will definitely occur. In addition, the production process is also very strict about the control of the spraying process, which includes the thickness of the spraying, the baking time and the baking temperature. The editor has seen many water cups on the market that look like the paint is unevenly sprayed at first glance. Due to uneven spraying and baking, it is necessary to control the paint color on the surface of the water cup so that no major changes occur. Therefore, the effect of spraying thin areas is generally compromised, which will result in insufficient baking temperature or duration for thick areas. Another example is the stainless steel water cup. Before spraying, the surface of the water cup must be sufficiently cleaned. Ultrasonic cleaning is usually used to clean the stains on the surface of the water cup, especially the oily areas. Otherwise, after spraying, Any place that is not clean will cause the paint to peel off first.

Is there any remedy? From a professional point of view, there is really no remedy, because neither the requirements for paint materials nor the requirements for the production environment can be achieved and satisfied by an ordinary consumer, but the editor has also seen many friends Through the graying of their own artistic cells, some painted and created again in the cracked areas, and some pasted some personalized patterns on the peeled off areas. The effect of this is really good, not only blocking the flaws but also making the water cup look better. Unique and different.

Warm reminder: After purchasing a new water cup, first wipe the surface of the water cup with warm water. You can repeat it several times to see the surface effect after wiping. If a new water cup is used for less than a month, the paint will appear cracked. The phenomenon can usually be seen by wiping, but do not use hard objects such as paint or steel wire balls to wipe. If you do this, the merchant will not refund or exchange the product.