Résumé : |
The article describes the history of ready-for-tanning chroma tanning materials from the time they were first developed to the present day.
The first such product was a liquid chrom tanning material which appeared on the American market. This was followed by drum-dried chrome tanning powders, readily soluble spray-dried chrome tanning materials and, later, by self-basifying chrome tanning materials. Recently, special chrome tanning materials from chrome tanning processes with high float exhaustion have been developed. Industrial progress, new production processes for leather and the development of chrome tanning materials have all interacted with each other. |