What are the key factors in preventing color streaking or uneven pigmentation in WPC tree boxes?

Preventing color streaking or uneven pigmentation in WPC (Wood-Plastic Composite) tree boxes requires attention to several key factors. First, ensure high-quality raw materials with consistent pigment distribution during manufacturing. Proper extrusion and molding techniques are crucial to avoid uneven color application. UV stabilizers should be added to the composite to prevent fading and streaking caused by sunlight exposure. Additionally, surface treatments like co-extrusion or painting can enhance color uniformity. Finally, regular cleaning and maintenance help preserve the appearance of WPC tree boxes over time. By addressing these factors, manufacturers and users can achieve long-lasting, visually appealing WPC tree boxes for outdoor applications.