Skin test and bleach??

[snaz]

Am I correct in saying that you do not skin test when you r doing a scalp bleach

 

[persianista]

Correct, but you should skin test if you are using a toner.

 

[Tomme]

Bleach skin tests will be useless as it is basically an irritant anyway and dosent contain ppd (what we are testing for sensitivity of) if you are using a toner on top or a toning shampoo it's best practice to do a test. Personally I just use a 1.0 with 6% for skin tests as its got the highest concentration of ppd, so if they have a slight allergy it will show up with that.
I have known people to test twice at te same time, one dab of 1.0 and a dab of the colour the client will be having which I think is a gd idea xoxo

 

[snaz]

Thanks, thought this was the case. Best to skin test either way invade toner required!!

 

[Haircentre]

Is it rumour that people's allergies change every seven years and that some people may all of a sudden develop allergies to hair tint. What about certain dies that require you to use 30 vol peroxide as obvious irritating to skin because of the higher percentage of peroxide.

 

[Tomme]

High strength peroxide won't make a really bad irritant, it is bareable for 24 hours. X