To determine whether a lunch box is made of high borosilicate material, the following methods can be used to distinguish it:
1. Temperature resistance test: A major characteristic of high borosilicate glass is its excellent heat resistance and resistance to temperature fluctuations. You can put the lunch box in the refrigerator and refrigerate it for several hours, then quickly remove it and pour in hot water that is close to boiling. A true high borosilicate glass lunch box should be able to withstand such drastic temperature changes without exploding. However, please note that this method carries certain risks, and be careful during operation to avoid burns or splashing of glass fragments.
2. Transparency and texture: High borosilicate glass usually has extremely high transparency and looks clearer and more transparent. When touched, the surface of the lunch box should feel delicate and smooth, and due to its manufacturing process, there may be some water ripple marks on the surface.
3. Wall thickness and weight: Compared to ordinary glass lunch boxes, high borosilicate glass lunch boxes have a relatively thin wall thickness, generally between 1.5-2.5mm, but also have higher strength. Therefore, when picking up a lunch box, if you feel that it is both lightweight and sturdy, this may be a sign of high borosilicate material.
4. Touch and Sound: When tapping on a high borosilicate glass lunch box, it will produce a crisp and pleasant sound, while ordinary glass may have a more dull sound.
5. Check the label: High borosilicate glass lunch boxes produced by legitimate manufacturers usually have material information marked on the product or packaging. Directly checking the product description or label is also a convenient method.
By combining the above methods, it is possible to accurately determine whether a lunch box is made of high boron silicon material. However, the safest way is to choose a reputable brand and channel when purchasing, which is more secure.
