Vials for Technical Works 10ml x 4pcs The Technical Work Lotion has beneficial properties for perming, dyeing and bleaching hair. The Technical Work Ampoules make hair soft, shiny and revitalized. How to use:Perm: For more protection, pour half the ampoule into the perm lotion. Mix well and apply. Fix and rinse the hair. Put the rest in a bowl with an equal amount of water, mix to make a cream and apply to the hair. Leave for 3 minutes and rinse well with plenty of water.Dyeing - Bleaching: After washing, pour the ampoule into a dye bowl. Add an equal amount of water, mix to make a cream, apply to hair, leave for 3 minutes and rinse thoroughly with plenty of water.