What is corrosion and tarnishing?

The most common defect on hardware is corrosion and tarnishing, where the product changes colour, goes rusty or the surface oxidizes. Low-quality hardware usually causes corrosion and tarnishing, due to an inadequate alloy and/or ineffective plating coverage or thickness.


Why test your hardware and jewellery for corrosion and tarnishing?

To ensure a high standard of product quality, all hardware and jewellery items need to first be tested as part of your due diligence process.

We test the following products for corrosion and tarnishing:

  • Watches
  • Jewellery
  • Fasteners for clothing and accessories
  • Metal components
  • Mobile phone and tablet cases
  • Metal homeware items
  • Children’s metal toys
  • Packaging tests


How long does the test take?    


Turnaround Time



5 working days



3 working days

£Quotation + 50%


Eurofins | BLC Hardware & Jewellery Testing

Eurofins | BLC carry out physical and chemical testing on hardware and jewellery products. Eurofins | BLC can also carry out tests for heavy metals and the skin irritant, Nickel.  

View BLC’s range of hardware & jewellery testing services:

Please read our testing terms and conditions. 

As standard, Eurofins | BLC provides:

  • Some of the fastest testing turnaround times in Europe
  • A fully comprehensive and easy to understand report
  • Technical back up and support from experts
  • Highly competitive pricing


Become a Eurofins | BLC Member, and you’ll also get:

  • Discounted prices
  • Priority testing allocation
  • Access to advanced technical support

What happens if your products are tarnished or corroded?

In our experience, corrosion and tarnishing is usually caused by low quality hardware that has inadequate alloy use and ineffective plating coverage or thickness. At Eurofins | BLC, we can measure the quantity and quality of the alloys used, and provide a detailed causal failure analysis.

In you are experiencing problems with your hardware, Eurofins | BLC is here to help. Our fault diagnosis and problem solving service will identify the root cause of any product quality issues.


Product and materials specifications

As with all materials, hardware should be specified for a particular end use and tested to ensure that it performs. We’ll create materials and product specifications for Eurofins | BLC Members, and we can also recommend testing routine.


Performance testing

Eurofins | BLC also provides a wide range of physical performance testing for hardware and jewellery.

Our Accreditations

Eurofins | BLC holds accreditations from UKAS and CPSC and has auditors approved to carry out LWG audits. Trust Eurofins | BLC to deliver some of the most accurate test results in the industry.

View our Accreditations


"I became a Member to take advantage their specification building services and 1-2-1 regulatory advice."

Gheli International


"I enjoyed the combination of theoretical and practical training on the 4-day leather course."


United Kingdom

"We thought every part of the Eurofins | BLC leather course was very informative and interesting."

John Lewis Partnership

United Kingdom

"Membership allowed us to use the expertise of Eurofins | BLC to improve our suppliers' environmental performance."

Clarks International

United Kingdom

"All parts of the leather training course were relevant and very informative. I now have a new appreciation for leather!"

Ralph Lauren

United States of America

"We were very impressed by the speaker on the leather training course who had excellent knowledge of the subject."


United Kingdom

"Through Eurofins | BLC Membership, we have access to technical support for leather product testing, helping us to provide more efficient services to our customers."

William Lamb

United Kingdom

"I just wanted to say a big thanks for 2 great days of leather education last week."



"I enjoyed all of the leather course as a chemist I wanted to understand the whole process of making leather."

Smit & zoon


"Eurofins | BLC Membership allows us to develop innovative high quality raw materials in order to continue our product improvement programme."


United Kingdom

“10 years of Eurofins | BLC Membership has enabled us to provide continuous assurance of product quality and safety, giving our customers greater confidence in our products.”


United Kingdom

"Smart chemical testing of wet blue saves our business time and money."

Casino Hide Tanners


Send An Enquiry

Contact Eurofins | BLC to discuss your enquiry with friendly and helpful experts and to get a quotation. For Eurofins | BLC to receive your enquiry, you must complete all 3 sections of the contact form below. To receive the Technical Update email, you simply need to complete this form. Eurofins | BLC aim to respond to all enquiries within 24 hours Monday to Friday.

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  • Step 2 Tell us about your business
  • Step 3 Tell us how we can contact you

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