Why Is a Skin Test So Important?
If you’ve ever booked a hair colour appointment, you’ll know that a skin test — also called a patch test — comes first. It’s easy to see it as a small inconvenience, especially if you’ve coloured your hair for years without a problem. But the skin test exists for one reason: your safety. Here’s an honest explanation from the team at Wisteria Avenue in Abingdon of what it is and why we never skip it.
What a skin test is
A skin test is a quick check carried out before a hair colour service, where a small amount of the colour product is applied to the skin so any sensitivity can be identified before it’s ever used on your head. It’s a simple, standard step — but a genuinely important one. Reactions to hair colour are uncommon, but when they do happen they can be serious, and the only way to reduce that risk is to test in advance rather than find out during the appointment.
Why we test every client
The honest answer is that a reaction can’t be predicted from the outside. Even clients who have coloured their hair for decades can develop a sensitivity, because the body’s chemistry changes over time — hormonal changes, pregnancy, illness and certain medications can all play a part. Past appointments with no reaction are reassuring, but they aren’t a guarantee for the future. Testing every client, every time it’s due, is simply how a responsible salon protects the people in its chair.
Why a test from another salon doesn’t carry over
This is the part that surprises people most: a skin test done at one salon doesn’t cover you at another. It isn’t that we doubt you — it’s that a skin test is specific to a salon and to the exact colour brand it uses. A different salon uses different products, holds its own records, and works to its own standards and insurance requirements. Even if two salons happened to use the same colour brand, you’d still need a test at each. The same applies if a salon changes the brand it stocks. It can feel over-cautious, but it’s the only way the test actually means anything.
How often you’ll need one
Skin tests don’t last indefinitely — they need renewing periodically, and the interval is set by the colour manufacturer’s guidance and our salon’s safety protocol. You’ll also need one if it’s your first visit to us, or if it’s been a while since your last appointment. The simplest approach is not to worry about tracking it yourself: when you book a colour service, we’ll let you know whether a skin test is due and arrange it in good time before your appointment.
Frequently asked questions
I’ve coloured my hair all my life. Why do I need a test with you?
Because the test isn’t really about whether you’ve had colour before — it’s about confirming you’ve been tested to this salon’s standards, with this salon’s products, with a record on file. It protects you, and it means we’re meeting our professional and insurance obligations. Colour is fine for the overwhelming majority of clients, but due diligence is something a good salon does as a matter of course.
I’m having a balayage, so I don’t need a test — right?
You still do. The theory is that the lightener and toner stay off the scalp — but in practice there’s still a chance of contact, for instance when the colour is washed off or when a toner is applied. The small risk is enough that a skin test remains important for balayage too.
I know I won’t react. Do I still need one?
Yes — honestly, this is the most important one. Nobody can know in advance that they won’t react, because sensitivities can develop at any time. The whole value of the test is that it checks something you genuinely can’t know without it. It may feel unnecessary, but it’s a small step for real peace of mind.
Book your colour appointment in Abingdon
If you’re thinking about a colour service, the skin test is simply the first step — and it’s also a good chance to chat through what you’d like. Get in touch to arrange yours ahead of your appointment, and have a look at our price list to see what’s involved.
