Test Method for Shrinkage Temperature of Wet Blue and Wet White

Importancia y uso:

5.1 This test method is designed to determine the temperature at which the Wet Blue or Wet White specimen experiences shrinkage. In this test method, shrinkage occurs as a result of hydrothermal denaturation of the collagen protein molecules which make up the fiber structure of the Wet Blue or Wet White. The shrinkage temperature of Wet Blue or Wet White is influenced by many different factors, most of which appear to affect the number and nature of crosslinking interactions between adjacent polypeptide chains of the collagen protein molecules. The value of the shrinkage temperature of Wet Blue or Wet White is commonly used as an indicator of the type of tannage or the degree of tannage, or both, of that particular Wet Blue or Wet White (especially for the more hydrothermally stable tannages such as chrome tannage).

Subcomité:

D31.02

Volúmen:

15.04

Número ICS:

59.140.30 (Leather and furs)

Palabras clave:

boil test; degree of tannage; shrinkage; shrinkage temperature; tannage; Wet Blue; Wet White;