You must take a patch test at least 48 hours before your appointment if you are a new colour customer or if it has been 6 months since your last colour or 48-hour allergy alert test with us. This is to make sure that our colour goods won’t cause an allergic reaction to you. Please get in touch with the salon in advance so they can make this arrangement for you. We may be forced to change the appointment date if you don’t take one prior to the scheduled time.