Leather special black LR-N is a noncancerogenic dyestuff instead of benzidine dyes. The dyeing properties were studied by compared experiments. And the most suitable dyeing route was settled.

• 皮革黑LR-N是无致癌毒性的联苯胺的代用染料，通过对比试验，研究了其染色性能，并找出了用该染料染山羊皮服装革的最佳工艺。