The BS 684-1-7 1976 (R2009) standard provides a physical method for the analysis of fats and oils, specifically for the determination of surface drying time. The standard specifies experimental methods to help determine the time required for fats and oils to form a drying film on the surface after Spreader or treatment. Surface drying time is a key parameter in the measurement of the coating drying process, which directly affects the performance and application effect of the product. This standard applies to the quality control of various fats and oils products to ensure that the drying process in the production process meets specific requirements.