Leibinger’s new pigment CIJ inks for industrial components

Hotter than lava flow – printing ink can withstand 1000° C

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CIJ
Leibinger developed a heat-resistant ink for the JET3up PI. The CIJ printer marks products without touching them

Astream of red lava can run as high as between 600 and 900 degrees. And things can get even hotter in industrial settings – for example, in a ceramic furnace. These high temperatures represent a real challenge for printing inks with which manufacturers mark the components even before firing.

“The danger is that the ink burns in the furnace and dissolves into soot. The typeface, such as a model number, would no longer be readable, so the component would be rejected,” explains Christina Leibinger, managing proprietor of Leibinger. “That’s exactly why we developed a new ink for our JET3up PI CIJ printer. It ensures a reliably readable typeface with high contrasts even at temperatures of up to 1000° C.” Not only ceramics can be printed, but also metal and glass; for example, in the production of light bulbs and halogen lamps. The printing ink is now available and compatible with the Leibinger JET3up PI CIJ printer.

Ink consists of floating, heat-resistant paint particles

Heat-resistant ink is a pigmented ink. Black color particles float in a medium – unlike a dye ink in which the dye is dissolved in the medium and evaporates immediately at extreme temperatures. The experts succeeded in modifying the pigment ink’s particles and medium in such a way that they can withstand heat of up to 1000° Celsius – unscathed. They also found a way to keep the particles in suspension through chemical stabilization. This slows down the so-called sedimentation process, in which the pigments settle. Additionally, the JET3up PI CIJ printer incorporates a stirring mechanism that continuously mixes the ink. “The combination of chemical stabilization and stirring mechanics ensures a reliable and low-maintenance labeling system.”

The heat-resistant pigment ink is designed for the JET3up PI; a printer that marks products without contact using the continuous inkjet (CIJ) technology. In the printhead, an ink jet, consisting of up to 96,000 electrically charged single drops per second, shoots through a nozzle. When printing, a high-voltage field changes the trajectory of individual drops, so that they end up as pixels on the product surface. The remaining drops fly into a catcher tube. They are then sucked back into the continuously circulating hydraulic circuit and used there. The printing technology is fast enough to keep up with conveyor belt speeds of up to 10 meters a second. The printer is also extremely cost-effective. The CIJ printer can print up to 120 million letters with one single liter of ink.

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