What phenomena or symptoms on the inner wall of stainless steel insulated cups do not affect the use of insulated cups?

Hello everyone, "Dong Dong Talk Cup" is here. The article about some symptoms of stainless steel inner walls published by the editor in a certain book has received a large number of inquiries from readers. The main inquiries are focused on whether the stainless steel insulated cups purchased have more or less obvious black spots at the bottom. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlCan these black spots still be used? As I am not a professional writer and only an ordinary worker in the water cup industry, I cannot reply to each one in a timely manner. Today, I would like to answer some of your questions and concerns.

I won't go into detail about the advantages of thermos cups and the benefits they bring to everyone. I will get straight to the topic. Some consumers have found black spots, scratches, or uneven colors on the inner wall of the thermos cups they use. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlFriends who left comments on a certain book, if you see these questions, please continue reading the following content. After these problems occur, does it mean that there are quality issues with this water cup? Is there a problem with the material? Is there a problem with the craftsmanship? Isn't it a qualified product?

Firstly, regarding the issue of black spots on the inner wall, this phenomenon is not uncommon in stainless steel insulated cups. Black spots are mainly formed by the reaction between minerals in water or some components in beverages such as tea and coffee that come into contact with the inner wall for a long time at high temperatures and the stainless steel material. This situation does not affect the structural performance or safety of the product, and is a common phenomenon of qualified products within the normal range. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlWhether it is 304 stainless steel or 316 stainless steel, such situations may occur, especially for water cups without electrolytic technology on the inner wall, which are more prone to such phenomena.

Secondly, regarding the issue of scratches on the inner wall, it is to some extent difficult to avoid during use. Although stainless steel material is hard and durable, it is likely to leave fine scratches on the inner wall when stirred with a metal spoon or other hard object. These scratches are mainly physical damages and do not affect the insulation effect or service life of the insulated cup, so they are considered normal within the qualified standards. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlSome consumers have also found scratches on the inner wall of newly purchased stainless steel insulated cups. The reason for the scratches is due to improper management and operation in a certain process during production. If they are not eliminated, it may be due to incomplete polishing or insufficient electrolysis. Scratches on new water bottles are not acceptable, but they will not affect their functionality and use. Each brand or cup company has different quality management standards, and if they cannot accept it, they can only coordinate with the merchant.

As for the phenomenon of uneven color on the inner wall of the insulated cup, it is usually caused by uneven distribution of coatings during the manufacturing process. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlDuring the production process, stainless steel cups may experience localized color differences at high temperatures. These color differences do not affect the insulation effect and do not involve safety issues. They are considered minor differences in appearance and are generally acceptable in industry standards.

In short, consumers do not need to worry excessively about the black spots, scratches, and varying shades of color on the inner wall of stainless steel insulated cups. http://www.zhanyict.com/en/ProductsDetail-VB-10430.htmlThese phenomena are mostly normal usage traces or small-scale deviations during the production process, and will not affect the normal use function of the cup. Of course, in order to extend the service life of the insulated cup, it is recommended to use and maintain it correctly according to the recommendations in the product manual. If there are obvious material defects or functional failures, consumers should promptly contact the merchant or manufacturer for handling.

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