1. Whiteness: no obvious color and luster is required for clear glass.
2. Air bubbles: A certain number of air bubbles with a certain width and length are allowed, while air bubbles that can be pierced with a steel needle are not allowed to exist.
3. Transparent lumps: refers to the glass body with uneven melting. For glass cups with a capacity of less than 142mL, no more than one with a length of no more than 1.0mm; for a glass cup with a capacity of 142~284mL, no more than 1.5mm in length. One, the transparent lumps of 1/3 of the cup body are not allowed to exist.
4. Miscellaneous particles: refers to the opaque granular sundries, the length is not more than 0.5mm, and there is no more than one.
5. Cup mouth roundness: the cup mouth is not round, and the difference between the maximum diameter and the minimum diameter is not more than 0.7~1.0mm.
