The ISO 16532-3:2010 standard specifies methods for the determination of grease resistance of paper and Cardboard, in particular the test of turpentine in the voids of Glass paper and greaseproof paper. This method evaluates the grease resistance of paper by the penetration of turpentine into the voids of the paper. It is suitable for papers that have obtained grease resistance by physical means, such as Glass paper and parchment paper. The standard content includes test principles, reagent selection, instrumentation, sample preparation, test procedures and result calculation. This method provides a scientific basis for the evaluation of the grease resistance performance of food Encasement paper to ensure its protective ability in contact with grease.