Even if you have used Water Colour hair dye before, and although it is an ammonia and PPD free hair dye, you must carry out a patch test every time you use it. Here is how you do a patch test using Water Colour hair dye:
1. Take a tiny pinch of Water Colour hair dye powder from the vial and mix it with a drop of warm water on a saucer. Reseal the vial immediately. Do not allow the remaining powder to get wet.
2. Wash a small area of skin inside your elbow and dry gently but thoroughly. Apply a drop of the Water Colour mixture to the area with a cotton bud and allow to dry. Do not wash off for AT LEAST 48 hours (Please be aware that in some cases the skin sensitivity/allergy test can take longer to react – up to a week for some people).
3. If during this period you experience any irritation, redness, swelling or burning, wash off immediately. It is likely you are allergic to an ingredient in this product and should not use it.
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