1. No bunch of bubbles at the mouth of the glass. Accept 3pcs bubbles with a diameter less than 2mm.
Major defect: Diameter over 2mm.
Minor defect: Diameter within 2mm
2. Height tolerance: +/-2mm for small capacity, +/3mm for big capacity, and +/-2mm height tolerance on one glass.
Major defect: over 2mm on height difference,
Minor defect: within 2mm on the height difference
3. Scratch lines with a length of 1.5cm are acceptable but not on the same plane.
Major defect: length over 1.5cm
Minor: Length within 1.5cm
4. The opening is round, even, with smooth hand feeling, no obvious sawtooth, well-melted connection, and no obvious outer/inner rim. one minor defect is acceptable, like a cave.
Major defect: hand feeling sawtooth, big wave
Minor defect: not round, not even, small sawtooth and small wave
5. Calm placed, No shaking.
Major defect: shake a lot;
Minor defect: shake a bit.
6. Smooth bottom, no obvious wave, and cave.
Major defect: big wave or cave;
Minor defect: little cave or wave
7. The Distance between the inner layer and outer layer at the bottom is 4-8mm
Major defect: over 10mm or less than 2mm;
Minor defect: 8-10mm or 2-4mm
8. Thickness is 1.2mm +0.4/-0.1. Use 15g weight mark pen drop from 30cm to test.
Major defect: break; No minor defect.
9. The decal should be complete, with no color variation, lack, bubble, or slanting.
10. Keep clear
11. No obvious water vapor, watermark, consult way to test,30cm distance ahead eyes, no finding under natural light.
Major defect: watermark dia. Over 2mm;
Minor defect: watermark dia. within 2mm
12. No black hole
13. No extra glue inside, no stain on the glue, dia. The glue hole is 3.5mm at most.
14. No leakage. Silicone plug no turns up, no bubble inside, the hole is transfixion, no glue block at the inside end. Critical: leakage.
Major defect: 2 or above bubbles inside;
Minor defect: less than 2 bubbles inside.
