How to clean tea stains on stainless steel insulated cups?
Oct 14, 2023
How to clean tea stains on stainless steel insulated cups?
1. Materials used
Before leaving the factory, it is necessary to confirm that the material used for the stainless steel insulated cup is qualified. The most important test for testing whether a product is qualified is salt spray testing, which determines whether the material is qualified through salt spray testing? Will it rust after continuous use?
Having been in the water cup industry for so long, it can be said that no matter how good the workmanship of the water cup is or how long the insulation and cold insulation performance is, as long as the material is not suitable or different from the material marked on the manual, it indicates that this water cup is an unqualified product. For example, using 201 stainless steel plates can easily impersonate 304 stainless steel. Mark the bottom of the water cup with a 316 stainless steel symbol, pretending that the inner liner is made of 316 stainless steel, but in fact, the bottom is made of 316 stainless steel or something.
2. It is necessary to pay attention to the sealing of the water cup.
In addition to professional testing tools, some unqualified factories also adopt strict sampling inspection methods for sealing during the production process. Close the lid of the water cup with full water, pour the lid for half an hour, and then pick it up to check for any leaks. Next, pour the water cup in and shake it vigorously 200 times, then check if there is any leakage in the cup.
The editor saw many brands on a well-known e-commerce platform experiencing consumer negative reviews and water leakage in the water cup sales review area. Such a water cup must be an unqualified product, regardless of the quality of the materials used and the cost-effectiveness.
3. Relatively good insulation performance.
The international standard for stainless steel insulated cups has been mentioned in other articles by the editor, and today we will briefly talk about it. Pour 96 ℃ hot water into a water cup, seal the lid, and open the measuring cup after 6-8 hours. If the temperature is not lower than 55 ℃, it is considered a qualified insulation cup. Therefore, friends who are interested in this field may want to test their own insulation cup in person.
If there are officially sold water cups, whether it is a book with insulation on it or a packaging box with clear indication of the insulation time of the water cup. For example, some water cups may have a insulation time of up to 12 hours, and if it is found during use that the advertised time cannot be reached, it will also be considered an unqualified product.
