The inspection of cartoon stickers focuses on appearance and printing quality. During inspection, the sticker surface must be checked for flatness, smoothness, and absence of obvious bubbles, wrinkles, scratches, or damage. Simultaneously, the printed pattern should be clear, with uniform color, free from smudging, fading, or blurring. Edges should be neatly trimmed, not affecting the sticker's aesthetics or usability. For transparent or partially UV-coated stickers, the adhesion and decorative effect of the pattern should also be checked.
The inspection rules emphasize adhesion and durability. Standardized peel tests or adhesion tests are used to check the initial tack and holding power of the pressure-sensitive adhesive layer on different material surfaces (such as paper, glass, metal, and plastic) to ensure the sticker adheres firmly and is not easily detached. Water resistance, oil resistance, temperature resistance, and abrasion resistance tests are also required to ensure the sticker remains intact and sticky even when exposed to moisture or friction during use.
Cartoon stickers also require safety and environmental performance testing. Materials, inks, and adhesives must meet non-toxic and harmless standards, and must not contain heavy metals or volatile harmful substances, especially for stickers intended for children. The product labeling, packaging integrity, and completeness of instructions for use should also be checked to ensure safe and correct operation by users. Strict adherence to these inspection rules ensures that the cartoon stickers meet the expected standards in terms of appearance, aesthetics, durability, and safety.
