Allergy-alert (patch) test record

What you need to know

The plain-English guidance that comes with this document.

• No test, no colour — even for regulars. An allergy-alert (skin) test before a colour service isn't a formality; a reaction to hair dye can be serious, and it can develop suddenly in someone who's been coloured for years with no problem. Do it at least 48 hours before the service, every time your manufacturer's instructions say to — and don't let a rushed client talk you out of it.
• PPD is the big culprit. Para-phenylenediamine (PPD) and related chemicals in permanent and dark colours are the common cause of dye allergy — and reactions range from an itchy scalp to hospital. Follow the manufacturer's testing instructions for the exact product you'll use, because different products test differently.
• Test the actual product, and re-test when things change. The test only means something if it's the product you'll actually use. Re-test if the client hasn't been in for a while, if you're changing brand or shade type, if they've had a reaction anywhere, or after events that can change sensitivity (like a recent tattoo, which shares chemicals with some dyes). When in doubt, test.
• Record it — this is your proof. Note the product, when you applied it, where, and the result at 48 hours. If a client ever reacts and it goes to a claim, this record is what shows you did the test properly. A colour done with no recorded test is an insurer's dream reason not to pay.
• Warn about "black henna". Temporary "black henna" tattoos (often abroad) contain high levels of PPD and can sensitise someone badly — a client who's had one may react violently to hair dye afterwards. Ask, and take extra care.
• It's a common insurance condition. Salon treatment insurance almost always requires patch testing to its terms. Skipping it can void your cover for a colour claim — so the two minutes protects the client and the business.
• Applies UK-wide. Patch/allergy-alert testing is standard practice and an insurance expectation across the UK. Always follow the specific product manufacturer's current instructions.