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The amount of natural fat in sheep's skin varies significantly, and this depends upon the animal origin, sex, age, etc. In wool acquired from sheep's skin from Australia and New Zealand, this content can account for up to 50% of dry skin weight. Fats are triglycerides of saturated fatty acids. These fats can cause complications in the presence of excessive natural fat, rancidification and oxidation; due to tanning, dyeing and finishing operations become tedious. The defects reveal themselves in the form of spume and objectionable odor in leather. If the natural fat content in the raw material is high, as is usually the case with sheep's skin, it must be removed. The process of fat or grease removal is called degreasing which is best carried out after pickling process. Fat dissolving solvents such as kerosene, methylene chloride, and trichloroethylene are employed for degreasing. Since these solvents are water insoluble, they cannot be effectively used for degreasing wet pelts. These solvents are therefore used along with emulsifiers (preferably non-ionic), which disperse the solvent in water, thus facilitating its entry inside the pelt. This paper attempts to study the degreasing action of secondary butyl ether and formulation (solvent and emulsifier) in comparison with a commercial product which is the global market leader in leather degreasing segment. This experimental study shows that an improved degreasing action was achieved with the formulation comparable to the commercial degreasing agent. [ABSTRACT FROM AUTHOR]