The BS 684-1-7-1976 standard specifies analytical procedures for the determination of surface drying time of fats and oils by physical methods. This method is used to evaluate the ability of fats and oils to form a drying film on the surface and their drying rate to ensure the performance of the product in a specific application. This standard is suitable for quality control and research and development in related industries. It provides a reliable test basis for the evaluation of drying time of products, and helps manufacturers optimize product performance to meet the needs of different application scenarios.