Labthink Knowledge

  A common misconception in the food industry is that once a "Best Before" date is set, it is set in stone. However, food packaging and shelf life are dynamic variables. To ensure consumer safety and brand reputation, shelf life should be revalidated whenever there is a change in the supply chain, recipe, or packaging material, as well as on a routine schedule to account for production "drift." This guide will outline the critical triggers for immediate re-testing and the industry best practices for maintaining long-term shelf stability. What events trigger an immediate revalidation of food packaging and shelf life? You should not wait for an annual audit to re-evaluate your products if any of the following changes occur: Packaging Material Transitions: Switching suppliers or moving to eco-friendly/recyclable films is the most common trigger. These materials often have different density profiles; even a slight change in the thickness of a barrier layer alters the...

When we think of food safety, we often imagine preventing mold or bacterial growth. However, there is an invisible frontier in food safety: the chemical interaction between a product and its container. Migration testing in food packaging is the scientific study of the transfer of chemical substances—such as monomers, plasticizers, and heavy metals—from packaging materials into the food or drink they hold (Intertek, 2024). Food Contact Materials (AI Generated Image) While visible spoilage is easy to spot, chemical leaching is undetectable to the consumer but poses significant long-term health risks. Section 1: Types of Migration: Overall vs. Specific Migration isn't a single measurement; it is categorized by what is being tracked and the level of risk involved. Overall Migration (OM): This measures the total amount of non-volatile substances that move from the package to the food. It is an indicator of the inert...