If you are fed up of filling in your eyebrows everyday or having fair lashes, then tinting might just be for you. Eyebrow tint can give modest eyebrows a fresh, bold look that lasts for several weeks. If lashes are fair eyelash tint will create visibly darker and more voluminous lashes and give the eye definition. A tint normally lasts between 4-6 weeks depending on your hair growth, time spent in the sun and how much you wash your face. You need a patch test 24hours before your treatment. The patch test involves having a tiny amount of dye applied behind your ear and takes 30 seconds to do.