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Blue4est ® - The Blue thermal paper from the black forest

The eco-friendly thermal paper from Koehler

Blue4est® is the innovative thermal paper from Koehler. It is guaranteed to be free of chemical developers and can easily be used in any conventional thermal printer.

Instead of a chemical reaction to heat, the emergence of text on our new Blue4est® thermal paper is a purely physical reaction.

The paper’s opaque functional layer turns transparent due to the effects of heat, and the black layer beneath it is revealed.


  • Ecofriendly
  • Resistant to outside influences such as sunlight and humidity
  • Long-lasting print (> 35 years)
  • Unmistakable due to its unique Color
  • Premium POS paper without chemically reactive components
  • The first thermal paper to be approved for direct contact with Food
  • Compatible with common thermal Printer
  • Outstanding printability
  • Award-winning technology: Koehler and Dow were awarded the US Green Chemistry Award 2017 for Blue4est®, among others

Why the Name Blue4est®?

On some days, the hills of the Black Forest take on a peculiar, shimmering blue color – which is just as unmistakable and unique as the color of our new Blue4est® thermal paper.

It is this proximity to nature which helps us come up with new products so often – just like the world’s first sustainable thermal paper, Blue4est®.


How does thermal printing work?


Learn more about how thermal printing works, how a normal thermal paper is structured, and what is different about Blue4est®.

Blue4est® - the Film

Blue4est® - the Film

Learn more about Blue4est® - the innovative thermal paper from Koehler.


If you have any questions related to our products, the Koehler sales team will be happy to help. Just send us your inquiries using our contact form.

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