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Typical Defects of UV 3C Coatings (VI)
Edge retraction is a common surface defect in the UV 3C coating process, significantly affecting both the edge‑protection performance and the overall aesthetic quality of the coating. Unlike pinholes—localized defects that typically occur in the bulk of the coating—edge retraction manifests as a tendency for the coating to shrink or recede at the substrate edges or in specific areas, resulting in reduced coating thickness at the edges and, in severe cases, exposure of the substrate. Given the stringent requirements of 3C products for coating integrity and edge‑protection performance, identifying the root causes of edge retraction and implementing effective process controls are of critical importance.
2026-06-26
Typical Defects of UV 3C Coatings (Part 5)
During the application of UV 3C coatings, cratering is a surface defect caused by poor leveling. It manifests as circular pits on the wet film surface, resulting from differences in surface tension between the top and bottom layers, and is typically visible through the substrate. The presence of cratering compromises the continuity and integrity of the coating, adversely affecting both its appearance and its protective performance. In the context of 3C electronic products, which demand stringent surface quality, the identification of cratering defects and the analysis of their underlying causes are of great significance.
2026-06-26
Typical Defects of UV 3C Coatings (Part 4)
During the application of UV 3C coatings, uneven gloss is one of the common defects that compromise the consistency of a product’s appearance. It manifests as inconsistent gloss levels across different areas of the same part—some regions appear shiny, while others appear dull—thereby undermining the overall visual uniformity. In high‑quality 3C products such as smartphone housings and laptop panels, uneven gloss can degrade the aesthetic quality and negatively impact consumer perception. Understanding the characteristics and root causes of uneven gloss helps identify this defect during the manufacturing process.
2026-06-26
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Bossin cordially invites you to visit the 2025 China International Coatings Exhibition.
UV monomer with a curing speed more than 30% faster than that of trifunctional monomers
Low-irritation version of HDDA
A high-refractive-index UV monomer
Although it’s quite ordinary, it offers great value for the price.
A UV monomer used in fields such as PCB ink, UV curing agents, and offset printing ink.
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