Reports on tests of 13 different leather dressings, three of the solution type (oils, fats, and/or waxes dissolved in a white spirit, hexane, or another solvent) and 10 of the emulsion type (these substances emulsified in water) that were applied on tanned calf leather that had been artificially aged (105°C, three weeks) and degreased using dichloromethane. To evaluate the effect of the dressings, tensile strength, stretch to break, tearing resistance, flexibility, water content, pH, content of volatile and water-soluble compounds, etc., were checked. In conclusion, a slight superiority of some emulsion dressings was found, e.g., of the modified Netherland formula: neat's-foot oil, lanolin, and a nonionic emulsifier called Arcopal in 89per thousand water.