Bamboo Charcoal Yarn for Warm-Up Hoodies: Compliance and Testing Checklist
Odour control is a performance claim, and in most markets a biocide claim as well. This is the documentation we prepare for warm-up hoodies built with Bamboo Charcoal Yarn.
What is being claimed
The claim is defined precisely: adsorption of 70-85% of the odour molecules in the test gas measured by JIS L 1902 antibacterial test. Wording on the product page, the hangtag and the tech pack must match, because vague claims are the ones regulators question. The sweat zone for warm-up hoodies is the back panel and the cuffs, which is where the treatment has to sit.
Biocide and chemical rules
Bamboo Charcoal Yarn uses charcoal particles embedded inside the filament. Active substances must be registered for textile use in the destination market, and the mill must be able to name the substance and its registration status. Every lot is measured against JIS L 1902 antibacterial test before the fabric is released for cutting.
Product safety certifications
Finished fabric is supplied to OEKO-TEX Standard 100 requirements, with ZDHC-conformant inputs and restricted substance testing available per lot. Retailer restricted substance lists are checked before bulk dyeing, not after. Cost impact is a yarn premium of 8-12%, which is usually recovered through fewer returns across a season.
Performance verification
Each lot is tested to JIS L 1902 antibacterial test and measured after permanent, because the additive sits inside the fibre. Reports carry the lot number, the standard revision and the conditioning details, so results are reproducible. Wear trials were run under warm-up, travel and cool-down rather than in the laboratory alone.
Records to keep
Keep the test report, the technical data sheet for the active agent and the care wording stating standard home laundering, since nothing is applied to the surface. Together they let you answer a customer, a retailer or a regulator with evidence. The care label states standard home laundering, since nothing is applied to the surface, and that wording is the condition behind permanent, because the additive sits inside the fibre.
