Your Hook-and-Loop Dye Report Covers One Colour, Not Every Colour
SGS tested our nylon hook-and-loop: all 24 regulated aromatic amines were not detected against a 30 mg/kg limit. The report covers one colour, not every colour.
Short answer: our nylon hook-and-loop was tested to EN ISO 14362-1:2017. All 24 regulated aromatic amines were not detected, against a 30 mg/kg limit and a 5 mg/kg detection limit. But the report covers the submitted sample. If your order uses four colours, ask which ones were tested.
Key takeaways
• 24 aromatic amines tested; all not detected in both the direct-reduction and dye-extraction procedures.
• Limit: 30 mg/kg per amine; method detection limit: 5 mg/kg.
• A report is tied to the submitted colour and dye lot — not to every colour in your order.
• Azo compliance is a chemical restriction, not a colourfastness or rub-fastness result.
• The fastener is one component; the finished bag needs its own file.
How we verified this
This guide is for European bike-brand product managers and sourcing teams preparing a compliance file for straps, flaps, and closures. The test data comes from SGS report NGBEC24000722412 for our nylon hook-and-loop. We reviewed the method, the list of regulated amines, the limit, and the detection limit. The factory timings are our own standard terms. We do not claim that one report covers every colour or every batch we ship.
Why azo dyes end up in a bike bag file
Azo dyes are restricted in the EU because some can release carcinogenic aromatic amines under certain conditions. For a brand, the risk is not the chemistry lesson — it is a component that goes into a product families and children handle.
Hook-and-loop is a touch point. It sits on straps, flaps, and closures that riders and passengers open and close constantly. That is why brands ask for the dye test on the fastener, not just on the main fabric.
What the test covers
The standard targets aromatic amines that can be released from azo colourants under reducing conditions. The report lists 24 amines, each with a 30 mg/kg limit and a 5 mg/kg method detection limit.
The laboratory ran two procedures: direct reduction and dye extraction. All 24 listed amines were not detected in both. The laboratory's conclusion was compliant with the requested requirement.
That is strong evidence for the sample. It is not evidence for every colour in your range.
What the report does not cover
Three gaps matter to a buyer.
• Every colour. A test covers the submitted sample. If your order uses black, olive, sand, and orange, ask which colours and dye lots were tested. A new colour can mean a new sample.
• Colourfastness. Azo compliance is a chemical restriction. It says nothing about lightfastness or rub-fastness. Those need separate tests.
• The finished bag. The fastener is one component. Fabric, webbing, thread, and the finished product have their own requirements.
A report that does not name your colour is not evidence for your colour.
Five checks before you approve the fastener
Before you accept an azo report as evidence for your hook-and-loop, ask five questions.
- Which colours were tested? Match the report to the colour codes in your order.
- Which material? Confirm the fibre and construction — nylon hook-and-loop is not the same as polyester or a blended tape.
- Which laboratory and report number? Keep the report number in your file so it can be checked later.
- Which method and limit? Confirm EN ISO 14362-1:2017, the 30 mg/kg limit, and the detection limit used.
- Same production source? Ask whether the material you receive comes from the same supplier and production source as the tested sample.
If the answer to the first or last question is "we will check later", the risk is still yours.
How we handle dye documentation
We have manufactured custom bike bags and fabric accessories for a premium German e-bike brand since 2016. The account grew from 500 units a year to 5,000 units per month.
For fasteners, we:
• match the hook-and-loop grade and colour to the design;
• request the test report and check which colours it covers;
• flag missing colours before sampling, not after production;
• keep the report with the order records.
Our standard timings are 7–12 days for sampling and 45–55 days for production after sample approval and deposit.
If your buyer needs a specific colour tested, say so before sampling. Retesting after production is slower and more expensive than planning for it.
Limitations
• The report covers the submitted sample; other colours and dye lots need their own evidence.
• Detection limits and regulated amine lists can change; confirm the current requirement with your buyer.
• Azo compliance does not cover colourfastness, durability, or the finished bag.
• This guide covers fastener documentation, not the legal status of your finished product.
FAQ
Does this report cover every colour in my order?
No. It covers the submitted sample. Ask which colours and dye lots were tested, and whether your order's colours are included.
Is "not detected" the same as zero?
No. It means below the method's detection limit, which is 5 mg/kg in this report. The limit for each amine is 30 mg/kg.
Does azo compliance mean the hook-and-loop won't fade?
No. Azo testing is a chemical restriction. Lightfastness and rub-fastness are separate performance tests.
Can I use this report for the finished bag?
Only as one component of the file. Fabric, webbing, thread, and the finished product have their own requirements.
Can Yagoo provide the hook-and-loop test report?
We can share the report we hold for the material and colour in your order and explain its scope. Availability depends on the colour and the batch.
Using hook-and-loop on kids' cargo bikes or passenger cushions?
Send your compliance checklist with the design, including the colour codes you plan to use. We will match the fastener, share the documentation we hold, and tell you which colours need testing before sampling.
References
- Yagoo Bag — Materials and Quality Control: https://colorwaybag.com/bike-materials-and-qc
- Yagoo Bag — Custom Bike Bag Sampling: https://colorwaybag.com/posts/custom-bike-bag-sampling
- Yagoo Bag — Contact: https://colorwaybag.com/contact-us
- ISO — Standards catalogue: https://www.iso.org/standards.html
- CEN-CENELEC — Standards: https://standards.cenelec.eu/