Glasses can be seen everywhere now. I believe everyone is no stranger, but do you know his purchase method? Let’s summarize the purchasing methods of glasses.
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 body with uneven melting. For the glass with a capacity of less than 142l, there shall be no more than one with a length of no more than 1.0mm; for the glass 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 pimple of the glass body is 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: it refers to that the cup mouth is not round, and the difference between its Zui large diameter and Zui small diameter is no more than 0.7 ~ 1.0mm.6. Stripe: it is not allowed if it is obvious by visual inspection at a distance of 300mm.
7. Low deviation of cup height (low deviation of cup height): the height difference between Zui high and Zui low 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 record grain. If it is obvious at head up, it is not allowed.
11. Cup body suction: 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 and the glass, leaving traces of tarnish on the glass body. If it is obvious from the flat view, it is not allowed. Scratches refer to the scars left on the surface of the glass body due to the collision between glasses. Shiny ones are not allowed.
After the above 12 points summarized by Xiaobian, I hope it will be helpful for you to buy glasses.