I have the oil on 03/12. ordered to refresh my 30-year old, long leather coat and already on 04/12. it was delivered. With cotton pads out of the bath and latex gloves I made the first attempts at highly stressed points of the leather jacket and discovers that the oil after pulling the partially brownish bodies makes them look blacker. The edges and seams look after treatment significantly better. The black leather oil is therefore not to be confused with black leather color, which would certainly be used with extreme caution in leather pieces such as coats and jackets. When the opportunity I will revise the mantle of course outside the apartment complete with oil, currently it's me out there at only 2 ° C too cold.