Tests of leather stability ageing

The kinetic analysis of ageing is based on the concept that the rate of most chemical reactions increases when the temperature increases, and that the physical properties of materials, which react with the environment, are affected by their chemical changes. The basis of the kinetic analysis is the law of chemical reaction kinetics  

The temperature-dependence reaction rate constant is described by the well-known Arrhenius equation  

American Association of Textile Chemists and Colorists (AATCC) (1997), AATCC Test Method 118 Oil Repellency Hydrocarbon Resistance Test, Research Triangle Park, NC, AATCC. 

American Leather Chemists Association (ALCA) (1954a), ALCA Test Method A22, Nontannins and Tannins in Vegetable-Tannins Extracts, Lubbock, Texas, ALCA. 

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