Test for Fats and Oil by keypoint The paper test – A drop of oil or melted fat on a piece of filter paper forms translucence. Sudan III Solution – When mixed with a few drops of Sudan III solution, the oil is stained red. Others are Viewing: Petroleum (crude oil) Fats and Oils Differences Between Fats and Oils Properties of Fats and Oils Test For Unsaturation Test For Starch Test For Simple Sugar