To improve fibre separation and disperse residual natural fat suitable electrolyte stable fatliquors can be added in the pickle or chrome stages. Such fatliquors / dispersing agents are in the BORRON and CORIPOL range. This will produce improved physical properties and yield softer, brighter leathers. If the wet-blue is to be used to produce automobile leathers due consideration must be given to the fogging characteristics of any fatliquor used.