RSL and MRSL: how chemistry is controlled in leather
Brands often ask a simple question about leather: is it safe? Two kinds of list help answer it.
RSL: the finished product
A restricted substances list (RSL) sets limits for substances in the finished product. Typical entries include certain azo dyes, chromium VI, formaldehyde, heavy metals and PFAS. Testing finished leather against the list shows whether it complies.
MRSL: the manufacturing process
A manufacturing restricted substances list (MRSL) covers the chemicals used to make the leather. The ZDHC MRSL is an industry-wide list for chemical inputs. Controlling inputs prevents problems before they can reach the product.
Two lists, two jobs
The MRSL controls the process, and the RSL checks the result. Together they give far more confidence than testing alone.
In practice
Leather from our group is tested to the group’s restricted substances list, which consolidates the brand lists the group supplies to. Test reports are available per article.
What to ask any supplier
- Which RSL do you test to, and which version?
- Which laboratory tests the leather?
- Can I have a report for my article and colour?
- How often is it retested?
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Request our catalogueRelated
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