The ISO 16532-1:2008 standard specifies a method for determining the grease resistance of paper and Cardboard, using a permeability test to evaluate the resistance of paper or Cardboard to grease. The test can be selected from creased or non-creased paper, using palm kernel oil as a simulated "fat material" to quantify the grease resistance by measuring the time the grease penetrates the paper. This method is suitable for food Encasement paper and Cardboard to help evaluate their protective performance in contact with grease and is an important reference for quality control and product development.