PATCH TEST

What does Patch Testing Test For?

Patch testing is the safest way to test whether a client is prone to a skin reaction called ‘contact dermatitis’. This is a type of skin sensitivity that can be triggered when the skin comes into direct contact with certain ingredients. It often results in itching, dryness and irritation that can also cause swelling.

What is the most common thing that will cause a reaction?

One of the most common causes of contact dermatitis is a chemical called paraphenylenediamine (PPD). Allergies to PPD can occur even when the client has had no previous reaction to it before, as they can develop over time. A severe allergic reaction to PPD can also result in allergies to other substances that have never been present before.

Why is Patch Testing Important?

Besides the client’s safety, comfort and well-being, patch testing is an insurance requirement. It is important to point out that if a client was to sign a waiver, a solicitor advises that such a thing will not stand up in court.

How Often Should You Perform a Patch Test?

HABIA (The Hair and Beauty Industry Authority) suggest repeating the patch test prior to every tinting treatment, and other governing bodies suggest every six months. New clients must have a patch test at least 48h before their treatment.

HOW IS A PATCH TEST COMPLETED?

1.⁠ ⁠Product that needs to be tested is prepared.

2.⁠ ⁠⁠A small amount of product is applied to a patch of skin, usually behind the ear or on the inner forearm.

3.⁠ ⁠⁠Leave the product on between 15-30mins. Periodically check the patch test, looking out for any adverse reactions, such as redness, itching or irritation.

4.⁠ ⁠After 30 mins, product can be removed and skin checked again for any signs of an allergic reaction.

5.⁠ ⁠⁠If there are no adverse reactions, client may be cleared for the full treatment or service. If there are any signs of a reaction, the salon may need to offer a different solution.

What Could Happen Without a Patch Test?

Skipping a patch test can lead to unexpected and uncomfortable reactions. You might experience redness, itching, swelling, or even severe allergic reactions like rashes, blistering, or burns. In some cases, reactions can escalate, causing long-lasting skin damage. A simple patch test helps prevent these risks, ensuring the product is safe for your skin.