![TEST 1 - ALLERGY AND SKIN SENSITIVITY](https://cdn.shopify.com/s/files/1/2119/8313/files/hair-colouring-test-2_medium.jpg?v=1498492588)
When using hair lightener/bleach
• Apply a small amount of the hair dye onto clean skin, either the inner area of your elbow or behind your ear, cover with a sticking plaster and leave for 48 hours
• If any irritation or swelling occurs during this time, remove product immediately with cool water and do not continue
• If at the end of the period you have experienced no adverse reaction, wash off with cool water & proceed with Test 2