How Water-Based Ink Printing Works on Mylar Bags & Pouches

Water based ink printing on mylar bags is an eco friendly process that uses water as a primary solvent to carry and transfer pigments onto the packaging surfaces. Mylar has a non-porous surface; this process is slightly more technical. The smooth surface of mylar does not naturally absorb inks like paper. Thus, it relies heavily on specialized surface treatments and specific drying/curing techniques. Let’s discuss how water-based ink printing works on custom printed pouches.

Understanding the Complete Printing Process 

1. Start With Surface Preparation

Mylar films are usually treated before beginning the printing process. This is done through corona or plasma treatment. They help improve the surface energy of the material. In simple terms, it helps the ink stick properly on the surface instead of sitting on top and smudging. Without this step, water-based inks would not bond well with the surface.

2. Ink Application Process

Once the surface treatment process is completed, the printing process begins. Water-based inks are applied to mylar bags using printing methods like flexographic or gravure printing. The ink contains water, pigments, and small amounts of additives that are used to improve adhesion and flow. 

The ink is then transferred onto the mylar surface through printing plates or cylinders. These printing plates carry the design. They ensure even distribution of ink across the pouch or bag.

3. Drying and Evaporation Process

Once the ink is applied to the bag, the printed film passes through a drying system. This process involves using air and heat to evaporate the water content from the ink. Once the water is fully evaporated, the ink pigments remain on the surface of the mylar film. It forms the final printed design. 

This step is extremely important because incomplete drying can affect print quality and durability. Proper drying ensures the ink sets correctly and does not smear or smudge.

4. Adhesion and Finishing Process

When the ink is dried, it forms a thin layer that clings to the treated surface of the mylar. Printing and packaging suppliers apply an additional coating or lamination over the print. 
This help protects the design from scratches, moisture, and external damage. For food packaging, this layer also helps maintain safety and prevents ink transfer.

When to Use Water Based Ink Printing

You must be wondering when to use water based ink printing. Well, it is commonly used for snack bags, food pouches, and other packaging, where low chemical content is required. This printing method works perfectly well for simple to moderately complex packaging designs. It is often chosen by brands that prioritize clean, safer, and eco friendly printing options. 

In a Nutshell

Water based inks are safer options than traditional printing options. However, it requires proper surface treatments and drying conditions for the best results. They may not match the high gloss finish or extreme durability level of solvent inks, but they are still considered a reliable choice for different packaging needs. Reach out to Print247 to achieve clean and stable printing results. They use a proper printing method to ensure your printed design looks flawless on mylar bags.