Is flexo printing suitable for food-grade packaging applications? | Keshenglong&Shinko Guide

Is Flexo Printing Suitable for Food-Grade Packaging Applications?

What is flexo printing and how does it work in packaging?

Flexo printing, or flexographic printing, is a rotary printing process commonly used for packaging applications. It uses flexible relief plates and fast-drying inks to print on various substrates such as plastic films, paper, and foil, making it highly adaptable for packaging types including food-grade materials.

Is flexo printing safe for food-contact packaging?

Flexo printing is widely considered safe for food-contact packaging when properly controlled. The inks used are specially formulated to comply with FDA regulations and European Union standards such as EU 10/2011, ensuring they are free from harmful substances. Additionally, water-based or UV-curable inks with low migration characteristics are preferred for direct food packaging to minimize contamination risk.

What are the regulatory requirements for flexo-printed food packaging?

Regulatory agencies demand that all inks and packaging materials used in food-grade applications pass migration and toxicity tests. For example, in the U.S., the FDA regulates these materials under Title 21 CFR. In Europe, compliance with the Framework Regulation (EC) No 1935/2004 and the Plastic Materials and Articles Regulation (EU) No 10/2011 is necessary. Keshenglong&Shinko ensure their flexo printing systems meet these standards by using certified inks and maintaining strict process controls.

Which substrates are compatible with flexo printing for food packaging?

Flexo printing works well on a variety of substrates for food packaging, such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), biaxially oriented polypropylene (BOPP), and paperboard. These materials, when combined with food-grade inks and coatings, create a safe barrier and maintain packaging integrity.

How to ensure quality and safety in flexo printed food packaging?

To ensure quality and safety, manufacturers must optimize ink selection, drying methods, plate quality, and substrate compatibility. Using low migration inks certified for food contact and maintaining clean press operations helps prevent contamination. Quality control testing, including migration analysis and sensory evaluation, is essential for compliance and consumer safety. Keshenglong&Shinko offers advanced flexo printing solutions with precise ink management systems that support these requirements.