Like with all haircolour you will have to do a skin allergy test 48 hours before use:
1. Remove earrings. Behind the ear and using a Q-tip, apply a small quantity of the unmixed colorant product (2 – The Colourant Cream) sufficient to cover an area of 1 to 2cm² (e.g. the size of a small coin). Carefully reseal the colorant container and keep it for your application 48 hours later.
2. Leave for 48 hours without washing, covering or touching. If during this period you notice any abnormal reactions, such as itching or swelling in or around the test area, DO NOT COLOUR YOUR HAIR UNTIL YOU CONSULT A DOCTOR.