Why do digital printed materials always bubble? The real solution lies in the pre-coated film

If you've ever done lamination for digital printings, you've likely encountered these problems: surface bubbling and insufficient adhesion leading to easy film peeling.

Many people immediately think: "Is the laminator temperature wrong?" "Is the pressure too low?" "Did the operator make a mistake?"

Actually, in most cases, the problem isn't with the machine or the operator, but with the film.

Why is bubbling so common in digital printing?

Digital printing (especially toner-based laser printing) has an inherent characteristic: the toner contains wax and silicone oil. These components are meant to prevent paper from sticking during printing, but for lamination, they are its "enemy."

The hot melt adhesive in standard thermal lamination film cannot effectively wet the surface of toner containing wax/silicone oil. The result is that the adhesive and the printed material don't actually bond - it looks like it's stuck on, but it's just "floating" on top.

Why don't ordinary film work?

The standard BOPP thermal lamination film is designed for offset printing. Offset inks are oxidative film-forming types with high surface energy and good adhesion. Digital toner is a low surface energy material, and ordinary film adhesive layers are largely ineffective against it. Using ordinary film to coat digital prints, bubbling is almost inevitable, if not a result.

The real solution: Dedicated super sticky digital thermal lamination film

This isn't marketing hype; it's materials science.

Guangdong EKO Film Manufacture Co., Ltd.'s digital pre-coated film was developed specifically for this purpose. It effectively solves problems like bubbling, delamination, and snowflake-like spots in toner printing. No need to change your lamination temperature (still 105-115℃), and no pretreatment of the printed material is required - simply change the film, and the problem is essentially solved.

A simple test

If you're currently using ordinary film to coat digital prints, try peeling off an edge with your finger. If you can easily tear it off, or if the toner remains intact on the paper after peeling (without being pulled up by the adhesive), it means it's not properly bonded. With the super sticky digital thermal lamination film, the same test will show the paper fibers being torn apart - that's true adhesion.

EKO's digital thermal lamination film, specially developed for digital printing, helps you achieve perfect finished products.

Need samples? Welcome to contact EKO Film - a professional pre-coated film manufacturer and lamination problem solver. We help you turn "bubbling" into "bubbling-free".