1. Blurred or Faded Text: Prolonged exposure to sunlight, humidity, or high temperatures can cause the ink to gradually decompose, making the text or icons difficult to read and rendering them ineffective.
2. Curled or Peeled Edges: As the adhesive layer ages, its adhesion decreases, causing the sticker edges to easily detach from the surface. This not only affects aesthetics but may also lead to complete removal due to friction.
3. Damaged or Dirty Surface: Scratches, contamination, or dust and oil can obscure the graphic information, preventing the sticker from conveying safety warnings immediately.
4. Loss of Adhesion After Repeated Removal: Especially for removable types like privacy stickers for mobile phone cameras, if they cannot adhere firmly after repeated use, they lose their protective function.
5. Discoloration or Brittleness: PVC material may harden and yellow after low temperatures or prolonged exposure to sunlight, and may crack with slight contact, indicating severe aging of the material.
⚠️ Special Reminder: The core value of safety stickers lies in their "continuous visibility and stable reliability." Even minor cosmetic damage that affects identification or adhesion should be considered a failure. Regular inspections are recommended, especially every 3 months for outdoor or high-frequency use scenarios.
