Selection method of glassware

Selection method
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EDITOR
1. Whiteness: No significant color is required for bright glass.
2. Bubbles: A certain number of bubbles of a certain width and length are allowed, and bubbles that can be pierced with steel needles are not allowed to exist.
3, transparent pimple: refers to the melting of uneven glass body, for the capacity of less than 142mL glass, the length of not more than 1.0mm not more than one; For glasses with a capacity of 142~284mL, there is not more than one glass with a length not greater than 1.5mm, and the transparency of 1/3 of the cup body is not allowed to exist.
4, impurity: refers to opaque granular debris, the length is not more than 0.5mm, not more than 1.
5, cup mouth roundness: refers to the cup mouth is not round, its maximum diameter and minimum diameter difference is not greater than 0.7~1.0mm.6, stripes: distance 300mm visually obvious is not allowed.
7, cup height low deviation (cup height low deviation) : the height difference between the highest point and the lowest point of a cup body is not greater than 1.0~1.5mm.
8, cup mouth thickness difference: not more than 0.5~0.8mm.
9, cut print: refers to the stripe or centipede cut mark, the length is not greater than 20~25mm, the width is not greater than 2.0mm, more than the bottom of the cup, or white hair bright, more than 3mm is not allowed.
10, printing: the cup body is a record grain hidden printing, head-up obvious is not allowed.
11, the cup body suction: refers to the cup body uneven, the obvious is not allowed to have.
12, rubbing and abrasion: rubbing refers to the friction between the glass and the diameter of the glass, leaving traces of tarnish in the cup body, and the obvious is not allowed to have. Bruise refers to the collision between glasses, leaving a scar on the surface of the glass, shining is not allowed.