How to do a skin patch test for hair dye

Do you often skip that step? We know we have. And it's a big mistake according to the experts. Marnie Nussbaum, a New York City dermatologist.

And don't think just because you've used a certain brand before that you're in the clear. Even if you've already tried a particular at-home dye in the past, you should always do a patch test first. Even more reason to be vigilant: Companies tend to switch up their formulas often. So what's the best way to do it? Open the box of hair color and look at the instructions. Using the instructions mix up a small amount of hair dye and developing solution.

Place the cap back on both bottles, making sure the seal is tight. If the bottle is left open the hair dye and developer will not work properly. Dip a cotton swab into the solution you mixed. Apply the mixture to the inside of one elbow.

Leave the solution on your skin for a full 48 hours. Watch for signs of an allergic reaction, such as redness, itching or swelling. If you notice any of these problems wash the solution off at once and call the manufacturer of the hair dye. Please do get in touch if you have suffered a reaction to your hair dye patch test, w e are happy to offer a refund as you cannot use the product. How to patch test at home 1. DO NOT use the product if you experience any reaction.

Mix a coin-sized amount of the colour formula A and activator B , plus the same sized amount of the Shade Shot Plus if adding for a personalised hair colour finish and mix together in a bowl. Once products are mixed, they cannot be kept and should be disposed of carefully. Or use a cotton wool pad wrapped around the pointed tip of the colour brush in our Accessories Kit. Please do contact us if this is the case and we will happily refund you for the product as you cannot use it.

If you show no signs of reaction to the hair dye, you are all clear to go ahead and use your perfect hair colour shade match as instructed. If you have any further questions on hair dye Allergy Alert Tests please do get in touch on expert joshwoodcolour.