Product Inspection Standards

**Product Inspection Standards**

**I. Purpose**
Clarify inspection responsibilities, standardize methods, and criteria for product visual inspection to ensure the effectiveness of the inspection process and results.

**II. Inspection Criteria**

1. **Color Deviation:** The difference between the material color and the approved sample color or color code exceeds the allowable limit.

2. **Saturation Deficiency:** Printing colors lack fullness, appear unreal, or exhibit flashing points.

3. **Plate Pattern:** Inconsistent ink color depth on the substrate forming lines of a certain width.

4. **Water Lines:** Stripes formed by the flow of ink during the printing process.

5. **Fine Scratches:** Fine, short scars on the surface of the substrate caused by roller abrasion.

6. **Hard Scratches:** Deep and long scratches on the surface of the substrate caused by hard objects or debris during production.

7. **Dirty Spots:** Impurities or dirt left on the substrate during the production process, with a measured size based on their maximum diameter.

8. **Bright Spots:** Small points on the surface of the substrate during printing not covered by ink, allowing light to pass through when backlit. Measured by their maximum diameter.

9. **Bumps and Depressions:** Uneven points on the surface of the substrate with varying depths.

10. **Glue Overflow:** After cutting, specifications exhibit adhesive seepage on cut edges, causing stickiness and potential labeling issues during the labeling process.

11. **Burrs:** Poor cutting leading to frayed edges on cut sides.

12. **Wrinkles and Folds:** Wrinkles or creases on the substrate or backing paper, causing uneven surfaces and potential warping during winding.

13. **Watermark:** Uneven water application causing the backing paper to bubble and appear uneven.

14. **Adhesive Deficiency:** Incomplete adhesive coverage on the substrate, resulting in localized lack of adhesive.

15. **Glue Particles:** Presence of adhesive particles in the glue raw material or formation of adhesive particles during application.

16. **Glue Lines:** Formation of a line on the adhesive surface during application due to impurities or dried glue.

17. **Glue Bubbles:** Formation of bubbles in the adhesive during application due to insufficient pressure or other reasons.

18. **Glue Threads:** Incomplete drying of glue or other reasons causing the adhesive to form threads when the substrate is peeled off.

19. **Poor Release:** Separation of the substrate from the backing paper, with the substrate’s appearance remaining intact. If separation causes visible characters or bright spots, it is considered poor release.

20. **Anti-counterfeiting Performance:** Display of anti-counterfeiting patterns when the substrate is peeled off from the adherend.

21. **Color Fading:** Unintended coating peeling off the substrate when peeled from the adherend, resulting in unclear characters.

22. **Curling:** Curvature of the material on both sides or front and back.

These inspection criteria aim to ensure the quality and integrity of the product, meeting established standards and preventing defects that may compromise its functionality or appearance.

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