Abstract

Technical work has been carried out on the consequences of treating chrome leather with the salts of di-acids with chain lengths up to C_36*. The initial effect is to increase the hydrophilic properties, to give sub stantial substance increments and to impart flexibility. On rechroming diacid salt treated leather, the normal hydrophobic properties of the leather are regained, in most instances, together with a further increase in substance and a separation of the fibres on drying. Some loss in area may be involved. Perspiration resistance is improved by some reagents: dyeing properties are affected.

* The commercial use of di-acid salts in the manner described is the subject of Provisional Specifi:ition B.P.38315/67.