~ Skip the shampoo a few days prior, but again, make sure it's manageable.
~ If you use a root cover spray or stick I do recommend washing it out or removing it before the appointment because sometimes the color may not penetrate enough to cover the grey.
~ I do recommend that you wait 24-48 hours after color to wash your hair. This gives the cuticle of your hair a chance to close down before shampooing hair.
~ Use a good quality Shampoo and Conditioner to prolong color.
If you do not use products I suggest your hair color may not be guaranteed
~ If swimming in the ocean or pool I do recommend that you wet hair with fresh water to prevent hair from absorbing salt water or chlorinated water which can be harsh on hair color.