How to do a Skin Allergy Patch Test – L’Oreal Excellence

The patch test described in the L’Oreal Excellence instructions say to only use the colourant part of the hair dye as it contains the para-phenylenediamine (PPD).

A small disclaimer – The photos used are of my arm. At the time I was taking some prescribed medication for migraines, hayfever nasal spray and over the counter antihistamines Zirtek. I do get eczema, I have no tattoos, I have never smoked and I have never had any henna tattoos.

Here is the skin allergy patch test. The patch test itself took no more that a few minutes to do and the drying time was between 30 minutes and 1 hour.My inner elbow before the patch test

Inner-elbow-beforep MixEz

The tube is clearly labeled.

Colourant-MixEz

Undo the lid and pierce the foil seal with the pointed section on the top of the lid. There is a bit of yellow coloured liquid which comes out first. This is not what you use for the patch test – this prevents any oxygen getting to the colourant and the colourant from degrading. It is the cream coloured creme that is used. Squeeze a small amount onto a cotton wool bud

On-the-cotton-bud-MixEz

and apply it in a 10p size to the inner part of your elbow or behind your ear.

Applying - MixEz

This is how my arm looked immediately after applying the colourant.

after-applying-MixEz

A little bit of redness and the rest of the arm is normal for me.

This is an hour after I had let the colourant dry.

1-hour-after-MixEz

It is visible to see something going on. It did initially sting a bit but this went off. The left over dried bits of colourant were gentle wiped off.

After 24 hours this is how my arm looked.

24-hours-after-MixEz

Apart from an impression from the sleeve I was wearing – it was absolutely clear. After the 48hours my arm was still clear.

All the photos I took for my 48hour patch tests are on my twitter account.

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