In 2022, this R&D work came to fruition when Zeller+Gmelin launched its first digital inks, UV-curable and water-based inkjet inks for labels, packaging and molded parts.
“Almost all printing press manufacturers that Z+G cooperates with in conventional printing processes are developing digital printing units or complete printing presses,” Koch said. “This applies to the narrow web segment, rigid plastics and all packaging printing for film and fiber-based substrates.”
“The great challenge in the development and production of inkjet inks is the perfect selection of raw materials, their precise processing, the adjustment to the appropriate printhead specifications and the incorporation of physical properties and chemicals required of the final ink film in ink systems almost as thin as water,” added Koch.
Koch said Zeller+Gmelin is focusing on the packaging segment.
“In the development of inkjet printing inks, we are clearly focusing on packaging printing,” he added. “Here we develop UV inkjet inks for non-sensitive and water-based inkjet inks for sensitive applications. In addition, our expertise in the development of inkjet inks gives us access to all kinds of industrial decorative applications. Since inkjet is a non-contact printing process, it can be used to decorate or coat almost any object imaginable, giving us access to a wide range of industries.
Currently, digital labels and narrow printing inks are primarily purchased from OEMs. Zeller+Gmelin sees opportunities to offer alternatives to OEMs.
“Zeller+Gmelin has been comfortable in these applications for many years and knows the requirements and regulations,” observed Koch. “It goes without saying that Z+G will also provide press manufacturers and printer users with innovative digital printing inks. In addition to our many years of experience printing packaging with conventional inks, we have built a team at Z+G that can look back on over ten years of inkjet experience. This allows us to be at the forefront of inkjet ink technology.
Glass and polypropylene are difficult substrates to print on and Zeller+Gmelin has developed inks for these applications.
“One of our first products is a UV inkjet ink with excellent adhesion to difficult surfaces such as glass and polypropylene,” Koch said. “The innovation is that adhesion is obtained without priming or pre-treatment. The ink is used for example in interior design, automotive and display advertising. We are in the process of introducing the ink to the global market for various applications.
“With water-based inkjet technology, we are developing inks for industrial applications for decorating non-woven materials and printing on absorbent and non-absorbent packaging materials,” Koch added.
Koch said the time has come for Zeller+Gmelin to enter the digital printing segment.
“I’m often asked if we started inkjet development too late,” said Koch. “My answer is that we started at exactly the right time. The big learning curve has already been paid for and we are accessing market-ready technology knowledge from the start and adding to our innovation. Additionally, the market urgently needs another player with the agility and development strength to take inkjet to the next level. We look forward to translating customer requirements into inkjet solutions with our usual professionalism.