Should I do the preliminary skin test before each and every use of Bigen Powder Hair Colour?
All permanent hair colour products including Bigen Powder Hair Colour require the preliminary skin test before each use. It is because permanent hair colours contain an ingredient called Diamin which causes antigen-antibody reaction to specific people. Even though you have been colouring you hair without any problem until today, an antibody to diamine may be produced in the body in course of time. Then skin irritation may occur on your face or head suddenly when you use hair colouring products some day. Therefore, you should do the preliminary skin test 48 hours before each and every use of Bigen Powder Hair Colour so as to ascertain whether you are sensitive to Diamine.
