With the rapid growth of corrugated packaging—particularly printing on recycled brown and kraft boards—the use of white ink has increased significantly. When printing on non-white substrates, white ink is essential for boosting colour brightness, improving legibility, and creating a solid base for other colours.White ink acts as a reflective foundation, helping colours appear more vibrant, consistent, and true to brand expectations.
For flexographic printers, white ink plays a critical role in achieving consistent colour reproduction and meeting brand-quality standards. It allows printers to deliver sharp graphics and reliable colour results, even on challenging substrates.However, the same properties that make white ink valuable also make it problematic—particularly for anilox rollers and key press components.
White ink contains a very high pigment load and typically has higher viscosity than other inks. These characteristics cause it to dry faster and penetrate deeply into anilox cells. Over time, this leads to cell blockage, reduced ink transfer, and uneven ink laydown.Once anilox cells begin to clog, print quality suffers—resulting in weak colour density, inconsistency, and rejected print jobs.
Because of its dense pigment structure, white ink is notoriously difficult to remove once dried. When it hardens, it can become brittle and break into fine particles. These particles may scratch the ceramic surface of the anilox roller, leading to scoring or permanent damage.Repairing or replacing a damaged anilox roller is costly—making prevention through correct maintenance absolutely essential.
When running white ink, strict cleaning routines are no longer optional. Regular wash-downs using cleaning chemicals specifically formulated for ceramic anilox rollers are vital.Timely and effective cleaning prevents pigment build-up, protects the cell structure, and ensures consistent ink transfer—helping anilox rollers remain in optimal condition for long-term use.
Due to the high viscosity of white ink, anilox roll selection becomes even more critical. Factors such as cell volume, line count (LPI), and engraving angle directly influence how efficiently white ink transfers to the printing plate.Using the correct anilox specification helps improve ink release, reduces cell clogging, and supports stable print performance—especially when paired with proper cleaning practices.
With more than two decades of experience in the flexographic printing industry, Roll Care Industries partners with printers to overcome the challenges of white ink printing.Our anilox cleaning solutions are designed specifically for flexographic applications, ensuring safe, effective, and reliable cleaning of high-value anilox rollers.Protect your anilox investment. Maintain print consistency. Contact our team to discuss your anilox maintenance and cleaning requirements.