Food Label and Packaging Migration Risk

It's not just ink! The risk of food label and packaging migration lies in these production stages

From the perspective of printing companies, food labels and packaging printing cannot tolerate even the slightest error. The "error" mentioned here is by no means just a few printing defects, but refers to the migration of harmful substances in the materials used in the printing process (mainly ink and substrate), which adversely affect the food itself or consumer health.



For this reason, the industry has introduced various material grading standards to screen compliant raw materials. Applied to ink categories, they are mainly divided into food-contact grade inks. Previously, the industry called "low-migration inks" now uniformly and uniformly named compliant migration inks.



In the field of food labeling and packaging printing, although the industry's overall understanding of food contact material (FCM) ink systems continues to improve, there are still common shortcomings and operational misconceptions in key areas such as migration risk awareness, production control, regulatory implementation, and responsibility allocation, which directly affect food packaging safety and compliance.



In this article, the author shares some common risks of migrating inks for food labels and packaging printing, as well as key points for compliance control, to help printing companies further deepen their understanding of ink systems for food contact materials.



The four major risks of ink migration



Ink migration in food label and packaging printing inks is not limited to a single form; the industry is generally known only as penetration migration, meaning ink components penetrate through the substrate onto the back of the print. In addition, there are three core migration risks that require comprehensive prevention and control.



The first is overprinting migration, mainly occurring during the rewinding of printing rolls, finished product stacking, logistics, and warehousing processes, where the print face contacts the back of another substrate, causing material migration contamination.



The second is vapor migration: during food heating, chemical components in the packaging ink and coating volatilize due to heat, forming gaseous particles that come into contact with the food, causing contamination.



The third is steaming extraction migration, where during food steaming and sterilization processes, core components of ink and coating are precipitated and extracted, causing harmful substances to come into contact with the food inside the packaging.



Common Misconceptions About FCM Ink Compliance



Currently, although industry insiders generally have a general understanding of food contact material inks, there are still some misunderstandings, namely insufficient understanding of the supporting production processes needed to reduce migration risks. Many people often overlook one point: merely meeting ink standards does not count as a fully compliant food contact material. Inks must be used in conjunction with designated substrates to meet food contact standards, meaning the choice of packaging substrate directly determines whether the entire package is suitable for food scenarios.



At the same time, ink curing and drying and raw material iteration and updates are also easily overlooked factors, and such risks often arise unnoticed. Inks specifically designed for food labels and packaging must be thoroughly dried and fully cured. When companies replace packaging substrates and auxiliary materials to control costs, if they do not sufficiently assess the barrier performance and safety attributes of the substitute materials, and ignore the safety logic of original material selection, it will greatly reduce the safety protection capability of packaging and undermine the original compliance system.



Additionally, many printing companies have a common misconception about compliance responsibilities for food labeling and packaging, believing that ink manufacturers can complete the entire process with a compliance certificate, and that the core of actual compliance testing is the final product packaging, not the single ink raw material. Currently, only a few companies worldwide can strictly implement regulatory requirements, adhere to regular compliance testing, and select matching compliant materials.



Global regulatory iterations continue



At the regulatory level, relevant regulations are constantly being updated and iterated. New cross-industry entrants must pay special attention to regulatory requirements, Good Manufacturing Practices (GMP), and product testing to ensure printed product compliance.



Although printers and brands mostly collaborate to ensure packaging meets relevant standards, revisions to existing regulations and the implementation of new regulations easily trigger compliance risks. The EU Single-Use Plastics Directive (SUPD) is a typical example. The core goal of this regulation is to reduce plastic use by replacing plastic packaging with coated paper and cardboard. The directive clearly prohibits the use of acrylic emulsions, polyurethane emulsions, and other materials for compliant packaging coatings, only allowing the use of natural polymer materials that have not undergone chemical modification, greatly increasing the difficulty of formula development and production for high-performance barrier coatings.



Compliance requirements for food labeling and packaging printing are complex, with the core goal of ensuring that materials used in printing do not migrate to the food inside, thereby altering the taste and smell of food, compromising food safety, and damaging food composition and quality. Meanwhile, regulations in various countries and regions continue to change, further increasing the difficulty of compliance implementation. Currently, there is no unified global regulatory standard for food packaging inks. The mainstream industry references are the "Swiss Printing Ink Regulation" and the "Guidelines for Non-Contact Printing Inks for Food Packaging" issued by the European Printing Ink Association (EuPIA). The "German Printing Ink Regulation" will fully take effect in January 2026. Compared to Swiss regulations, Germany's new regulation covers all scenarios of direct food contact, foreseeable contact, and indirect contact, and may become a core compliance reference standard for cross-border packaging printing across multiple countries in the future.



Full-process production control



Printing companies must thoroughly understand product application scenarios and conduct risk assessments for printed products. Regulatory controls target the final packaged product, not just a single ink. Companies must establish professional compliance teams and strictly implement Good Manufacturing Practices (GMP).



Of course, many influencing factors are beyond the control of printing companies. Even though design, ink, and substrate selection have been minimized to avoid migration and contamination risks, if control is neglected, printing factories will still cross the red line of food packaging regulations. During practical operation, the following key control points require special attention:



First, although the formula for food contact material inks is developed according to standard printing parameters (printing speed, ink coating density) set by equipment manufacturers, these parameters change with use, so migration indicators must be regularly retested to continuously ensure compliance.



Second, printing and processing enterprises need to carefully evaluate the barrier properties of substrates, regularly maintain curing equipment, and ensure the normal operation of curing lamps.



Third, fully implement good production practices. Enterprises with the necessary conditions are advised to use dedicated printing machines to produce low-migration ink products, which not only eliminates cross-contamination but also reduces downtime losses caused by order changes and cleaning.



Fourth, standardize warehousing and material transfer processes to reduce migration risks. Strong odors and air pollutants such as vehicle exhaust in storage areas can seep into some substrates, triggering migration; When printed products are stacked and stored, the print surfaces come into contact with each other, which can also cause overprinting. Enterprises must strictly control the contact surfaces of all types of harmful substances with food and establish sound control mechanisms.



In addition, printing consumables are also included in compliance controls. Auxiliary materials such as cleaning fluids and offset printing wetting fluids, as well as workshop cleanliness standards and production batch coordination, all affect product compliance. Residues from production of non-compliant materials in previous batches and inadequate workstation cleaning can both lead to excessive chemical content in finished ink products, triggering compliance risks.



In summary, compliance control for food labeling and packaging printing cannot be achieved by meeting standards for a single material; it is a full-system project spanning design, material selection, production, equipment, and warehousing. With global regulations tightening and deplasticization reforms deepening, printing companies must clarify migration risks, clarify responsibilities for all parties, implement refined production controls, keep up with new regulations, and improve risk assessment and testing systems to fundamentally avoid compliance failures, ensure product safety, and ensure stable connections with domestic and international markets.