What are the ingredients of WECOLOUR hair dye?

I'm allergic to hair dye. Can I try WECOLOUR?

Is it recommended to do an allergy test before dyeing?

I have dyed my hair before with no allergic reaction. Should I perform an allergy test?

Can I receive a hair dye tester for an allergy test?

How does the allergy test work?

What should I do if I have an allergic reaction?

What should I do if the hair dye burns on my scalp?

What is PPD?

What is ammonia?

What are parabens?

What is resorcinol?

Is there nickel in your hair dye?