Research Article
Vegetable Tannins as Chrome-Free Leather Tanning
Table 4
Mechanical strength of Cassia singueana and Mimosa extract tanned leather samples.
| | Property | Tanned leather | | Cassia singueana extract | Mimosa extract (standard) |
| | Tensile strength (N/mm2) | 15.6 | 14.8 | | Elongation at break (%) | 45.3 | 38.7 | | Tear strength (N/mm) | 24.2 | 22.5 |
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