Re-Tanning

The Re-Tanning Production Stage covers the further processing of tanned wet leather, including leather dyeing and fat liquoring, but not including drying or surface treatments. All Leather Example Materials share several common Re-Tanning process options. The plant-based materials category has no process options for this Production Stage, as all impacts are included in previous Production Stages.

  • Leather finishing, 1 drum operation (dyeing, waterproofing or fatliquoring) is the default process selection and should be used unless another Re-Tanning process is applicable. This process covers the leather processing in a single rotating tanning drum.
  • Leather finishing, 2 drum operations (dyeing, waterproofing or fatliquoring) should be selected when the processing of the leather involves two separate operations in rotating tanning drums.
  • Leather finishing, 3 drum operations (dyeing, waterproofing or fatliquoring) should be selected when the processing of the leather involves three separate operations in rotating tanning drums. If more than three drum operations are required, this process should still be selected as the most representative option.
  • Retanning Kind Leather {Asiatan} (impact contained in tanning stage) should be selected only when using Kind Leather from Asiatan that includes tanning, re-tanning, drying, and finishing. When selecting this process, it should be paired with the “Kind Leather {Asiatan}, (includes tanning, re-tanning, drying, and finishing)” process in the Tanning stage.
  • Retanning {PrimeAsia} (impact contained in tanning stage) should be selected only when using Finished Leather from PrimeAsia that includes tanning, re-tanning, drying, and finishing. This process applies to both: Finished leather, from Steers (US and Australia) {PrimeAsia}, and Finished leather, from South American raw hides {PrimeAsia}.
  • Finishing, 1 drum operation (dyeing, waterproofing or fatliquoring), reptile leather is the default process selection for reptile leather and should only be selected when finishing reptile leather. 
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