A Guide to Thermochromic Ink Printing (Color-Changing)

Thermochromic ink printing changes color during temperature fluctuation. The ink contains microencapsulated leuco dyes that change color or become transparent when temperature changes. This printing method is mainly used for interactive packaging. The process works perfectly well with different printing methods, such as:

• Flexography and Gravure

• Offset and Digital Printing

• Screen Printing

In this short piece, we will discuss how thermochromic ink printing (color-changing) works with mylar bags.

How Thermochromic Ink Printing Works?

Let’s discuss how thermochromic ink printing actually works:

• The process begins with microencapsulation. The ink contains microscopic capsules (3 to 5 microns in size) that contain leuco dyes, a temperature sensitive solvent, and organic acids. 

• When the temperature crosses a specific threshold, the solvent melts. This melting process causes a chemical reaction that opens or closes the dye’s molecular ring. This alters how it absorbs and reflects light. 

• Printing and packaging experts apply the ink using rotogravure or flexography before laminating the mylar layers. 

• Many packaging uses reversible ink. It means the original color returns once the temperature drops. 

The Benefits of Using Thermochromic Ink Printing

Thermochromic ink printing offers several amazing benefits. Let’s discuss its amazing advantages in detail:

• This printing method enhances consumer engagement. Color changing mylar packaging creates an element of surprise which instantly boost brand visibility. 

• When the color changes on the packaging, it acts as an easy to read sensor that indicates temperature fluctuation. 

• Thermochromic ink printing is also used as a security feature as it allows users and inspectors to easily authenticate the items.

Final Thoughts

Thermochromic ink printing is a specialized printing method that is used for different purposes. When applied on Mylar (PET) film, the activation of these inks via touch or temperature creates a highly interactive experience for customers. Overall color changing packaging enhances brand engagement and leaves a strong impression on customers. 

Reach out to Print247 to create packaging that elevates your brand’s perception. We guarantee performance and efficiency by offering you solutions that transform your packaging experience.