Formaldehyde Content Testing and Restricted Substance Limits
Formaldehyde appears in some resins and finishing systems, and its content is regulated for skin-contact and childrenswear products.
The following sections cover the definition, the specification values, production control, testing and commercial impact.
Where formaldehyde originates
Resin finishes for easy care, certain printing binders and some fixing agents are the usual sources.
In practice the goal is predictability: the same result on the first order and on the fifth reorder.
Test methods
Free and released formaldehyde are measured by standard colorimetric or chromatographic methods, and both may be required.
Add the value to the pre-production sample approval sheet so it is checked before bulk rather than after shipment.
- Ask for a separate price line for the requirement
- Confirm minimum quantities before committing the colourway
- Build one extra approval round into the calendar
Regulatory limits
Limits depend on the product category, with the strictest values applied to childrenswear and skin-contact textiles.
Where several lines produce the same style, align settings across lines before the order starts.
Prevention in the supply chain
Chemicals selected against the relevant restricted substances list avoid the problem at the source.
Compare results before and after the intended care regime, since performance often changes after the first wash.
- Confirm the numeric range and the test method in the specification
- Keep an approved physical standard at the machine
- Retest after the agreed care regime before shipping
Verification frequency
Test per production lot when a formaldehyde-containing process is used, rather than once per season.
Keep a buffer in the schedule for one additional approval round, because most programmes use it.
Summary
A clear specification, a trained operator and a documented test together remove most of the risk from this part of the programme.
