Method of purchasing glass cups


1. Whiteness: There is no significant color requirement for exposed glass.
2. Bubbles: A certain number of bubbles with a certain width and length are allowed, while bubbles that can be punctured with a steel needle are not allowed to exist.
3. Transparent lumps: Refers to glass bodies with uneven melting. For glass cups with a capacity of less than 142L, there should be no more than one glass cup with a length of no more than 1.0mm; For glass cups with a capacity of 142-284mL, there should be no more than one glass cup with a length of no more than 1.5mm, and no transparency bumps of 1/3 of the cup body are allowed.
4. Miscellaneous particles: Refers to opaque granular debris, with a length of no more than 0.5mm and no more than 1 particle.
5. Cup mouth roundness: Refers to the cup mouth not being round, and the difference between its maximum diameter and minimum diameter is not greater than 0.7~1.0mm. 6. Stripes: Visual inspection at a distance of 300mm is not allowed.
7. Low deviation of cup height (low deviation of cup height): The height difference between the highest and lowest parts of a cup body shall not exceed 1.0-1.5mm.
8. Thickness difference of cup mouth: not more than 0.5~0.8mm
9. Shearing marks: Refers to stripes or centipede shaped cutting marks, with a length of no more than 20-25mm and a width of no more than 2.0mm. They should not exceed the bottom of the cup or be white or shiny, and those exceeding 3mm are not allowed.
10. Moulding: The cup body has a hidden print with a record pattern, and it is not allowed to have obvious flat view.
11. Shrinkage of the cup body: refers to the unevenness of the cup body, which is not allowed when viewed horizontally.
12. Scratching and scratching: Scratching refers to the friction between the diameter of the glass cup and the diameter of the glass cup, leaving traces of tarnishing on the body of the cup. It is not allowed to have obvious scratches on the surface. Scratches refer to the scratches left on the surface of the glass body caused by collisions between glasses, and shiny ones are not allowed.

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