Any Colour Restore shade can be used immediately after perming or relaxing. For best results rinse off the neutraliser and apply the Colour Restore shade to the hair whilst it is damp and un-conditioned. Work the shade through the hair and give it a 5-minute development, before rinsing.
NB: Because Colour Restore features semi-permanent colour molecules, these molecules will be pulled from the hair with any permanent chemical process. Therefore, if you do use a Colour Restore shade and subsequently perm, relax or apply a chemical based colourant, your Colour Restore shade will need to be re-applied after your chemical treatment. It is perfectly safe to do this immediately after said chemical treatment.