skin test required 48 hours before colour

Has it been more than 6 months since you last had a colour in your salon? Is it more than 12 months since you last had an skin test Test? Have you had any type of skin tattoo, including henna or permanent make-up, since their last colour service? Have you had an allergic reaction to any products since their last colour service? OR used home colour. If you answer yes to any of these you need a skin test