Biokap Nutricolor Delicato Hair Dye’s special recipe, which contains vegetable elements and has a high skin tolerability, nourishes and repairs hair while colouring it and completely covers grey hair. How To Use Insert the Nutrifix bottle in the hole outlined on the back of the packet and wear the disposable protective cape supplied. Then mix the content of the colour tube following the instructions given in the relative leaflet. Choose the shade according to the quantity of grey hair, following the instructions on the packet. Warnings Before using the product, carefully read the instructions on the package. Always perform a sensitivity test 48 hours before each application.