Vegetable Tannins as Chrome-Free Leather Tanning

Table 5

Chemical constituents of Cassia singueana extract and mimosa extract tanned leather samples.

Parameters	Sample type
	Cassia singueana bark extract tanned leather	Mimosa extract (standard) tanned leather
Moisture content	8.974 ± 0.071	9.017 ± 0.152
Ash content	3.255 ± 0.372	3.751 ± 0.064
Fat content	11.72 ± 0.8241	11.87 ± 0.4216
Hide substances (%)	50.3%	50.5%
Water-soluble matter	4.325 ± 1.221	4.461 ± 0.973
Degree of tanning (%)	56.5%	57.7%