Preliminary Test Instructions

Instructions for Preliminary Test:

The preparation may cause serious inflammation of the skin in some persons, and a preliminary test should always be carried out to determine whether a special sensitivity exists or not. To make the test, a small area of skin behind the ear or on the inner surface of the forearm should be cleansed, using either soap and water or alcohol. Prepare a small quantity of the hair dye in a small non-metallic container, should be applied to the area and allowed to dry. After 48 hours, the area should be washed gently with soap and water. If no irritation or inflammation is apparent, it is usually assumed that no hypersensitivity to the dye exists. The test should, however, be carried out before each application. On no account should the hair dye be used for dyeing eyebrows or eyelashes as severe inflammation of the eye or even blindness may result.