Selection Method Of Glass

1. Whiteness: no significant color is required for exposed glass.

2. Bubbles: Bubbles with a certain width and length are allowed to exist in a certain number, while bubbles that can be pierced with a steel needle are not allowed to exist.

3. Transparent pimple: refers to the glass with uneven melting. For the glass with a capacity of less than 142ml, there shall be no more than one with a length of no more than 1.0mm; For glasses with a capacity of 142 ~ 284ml, there shall be no more than one with a length of no more than 1.5mm, and 1 / 3 of the transparency bumps of the cup body are not allowed.

4. Miscellaneous particles: refers to opaque granular sundries, with a length of no more than 0.5mm and no more than 1.

5. Cup mouth roundness: refers to that the cup mouth is not round, and the difference between the maximum diameter and the minimum diameter is no more than 0.7 ~ 1.0mm 6. Stripes: those with obvious visual inspection at a distance of 300mm are 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 be greater than 1.0 ~ 1.5mm.

8. Thickness difference of cup mouth: no more than 0.5 ~ 0.8mm

9. Shear marks: refers to stripes or centipede like shear marks, no more than one with a length of no more than 20 ~ 25mm and a width of no more than 2.0mm, exceeding the bottom of the cup, or white and shiny, and no more than 3mm is allowed.

10. Die print: the cup body is a hidden print with the texture of the record. If it is obvious at head up, it is not allowed.

11. Cup body sucking: it refers to that the cup body is uneven and the head up view is obvious, which is not allowed.

12. Scuffing and scratching: scuffing refers to the friction between the diameter of the glass cup and the glass cup, leaving traces of tarnish on the cup body. It is not allowed to have it if it is obvious from the flat view. Scratch refers to the scars left on the surface of the glass body due to the collision between glasses. Shiny ones are not allowed.