Grease Resistance Protocol
Evaluation of the grease barrier on a food-grade substrate utilizes specialized chemical reagents to track oil migration. Iso 16532-2 specifies the use of a grease-based reagent to determine the time required for staining to occur on the unexposed side of the material. This standard focuses specifically on the palm kernel oil method, providing a realistic simulation for food packaging applications.
It establishes the criteria for a pass or fail result based on the appearance of the first visible spot.
Analytical Method
The test involves placing a specific volume of the test liquid onto the substrate under controlled pressure and temperature. When following iso 16532-2, the sample is placed on a white blotter paper that makes any penetration easy to detect. Technicians check the blotter at regular intervals for any signs of grease migration.
This duration determines the grease resistance rating of the board. The procedure is more accurate for heavy-duty barriers than the kit test because it measures actual penetration over time rather than surface energy.
Compliance Requirement
Food manufacturers rely on this data to ensure that oily products do not stain the outer packaging. Adherence to iso 16532-2 provides a globally recognized benchmark for material safety and performance.
