What is ISO 17234‑1 about?
ISO 17234‑1 is a series on leather. Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay.  ISO 17234‑1 specifies a method for determining the use of certain azo colourants which can release certain aromatic amines.
Who is ISO 17234‑1 for?
ISO 17234‑1 on leather is useful for:
- Leather manufacturing industries
- Leather testing institution
- Quality control personnel
Why should you use ISO 17234‑1?
Leather can be used to make a variety of items, including clothing, footwear, handbags, furniture, tools, and sports equipment, and lasts for decades. Azo dyes are a group of dyes that may often be used as colourants in the textiles industry for their increased colour fastness properties and for providing a wide range of vibrant colours.
ISO 17234‑1 provides the required guidance on conducting the use of azo colourants including the safety precautions needed for performing the test, apparatus, reagents, sampling and preparation of samples and procedure of the test.
ISO 17234‑1 helps the users to make their product best in the aspects of colour, appearance, quality, durability. All these aspects will improve credibility and consumer confidence. Using ISO 17234‑1 you can specify a method for determining the use of certain azo colourants.
What’s changed since the last update?
BS EN ISO 17234‑1:2020 supersedes ISO 17234-1:2015. BS EN ISO 17234‑1:2020 includes some technical changes with respect to ISO 17234-1:2015. These include:
- New Terms and definitions have been added
- Technical changes to apparatus and reagents
- Changes to sampling and preparation of samples and procedures to improve the method
- Assessment guide — interpretation of analytical results2 expanded to give examples of false-positive results, suggested procedures and suggested comments in the test report
- A new informative procedure for liquid/liquid extraction without diatomaceous earth added
