Glassware quality: pure and uniform, with no defects such as sand, streaks, bubbles, etc. The transparency of the colorless glass is high; the color of colored glass is uniform and stable, and it can absorb light energy of a certain wavelength.

Physical and chemical properties: It has certain chemical stability and does not interact with the contents. It has certain shock resistance and mechanical strength, can withstand heating and cooling processes such as washing and sterilization, as well as withstand filling, storage, and transportation, and can remain intact when encountering general internal and external stress, vibration, and impact.

Molding quality: maintain a certain capacity, weight, and shape, with uniform wall thickness and smooth and flat mouth to ensure convenient filling and good sealing. No distortion, uneven surface, unevenness or cracks.