Meaning
Protective liquid coating applied over printed paper, board, or film to guard against abrasion, moisture, and chemical exposure during handling. This surface treatment is essential for printed retail packaging to preserve branding integrity and barcode legibility from the factory to the store. It provides a barrier that prevents ink smudging and scuffing during transit.
Surface Protection
Retail packaging is subjected to physical friction during maritime and domestic transport. Applying a high-durability overprint varnish ensures that the product presentation does not degrade when boxes rub together inside shipping containers. This protective layer reduces the rate of product returns due to damaged or scuffed retail presentation.
Performance Specification
Packaging suppliers must adhere to strict gloss and friction requirements set out in distribution agreements. If the overprint varnish is too slick, it can cause stacked boxes to slide and collapse during warehousing, resulting in inventory damage. Contracts therefore require specific coefficient of friction levels to maintain stack stability in logistics facilities.
Cost Benefit
Investing in a high-quality protective finish helps to control the total landed cost by minimizing the incidence of unsellable merchandise. Retailers often reject damaged boxes because consumers bypass scuffed packaging on shelves. This risk reduction justifies the minor additional cost of the coating.
