How to distinguish the quality of the glass?

Glassware always has a good side and a bad side, we know that. All products have good and secondary, so we will pay attention to many aspects when choosing glass cups, advertising cups, gift cups and other products. Some defects can be seen from the appearance of the product, so you can avoid choosing unsatisfactory and bad products. Here are a few things to look out for when buying a glass

1. Miscellaneous particles: refers to the opaque granular sundries, the length is not more than 0.5mm, not more than 1.

2. Bubble: bubbles of a certain width and length are allowed to exist in a certain amount, but bubbles that can be pierced with a steel needle are not allowed.

3. Transparent lumps: Refers to the uneven melting of the glass body. For glasses with a capacity of less than 142l, no more than one glass with a length of no more than 1.0mm; with a capacity of 142 glasses of 284ml, no more than one glass with a length of no more than 1.5mm, and the transparency of the cup body does not exceed 1/3.

4. Cup height deviation and cup height deviation: the height difference between the cup height and the lower part is not more than 1.01.5 million.

5. Cup mouth roundness: refers to the cup mouth is not round, the difference between the large diameter and the small diameter is not more than 0.7 1.0mmo

6. Stripes: No visible stripes are allowed at a distance of 300mm.

At the time of purchase, only in this way we can avoid any problems when using it.