Another option is to cover the dyed sections with foil or plastic. Then, rinse the darkest sections of your hair first to prevent them from bleeding onto the lighter sections.
You can use warm water to wash your hair, just make sure it is not hot. Hot water opens up the cuticles in your hair and lets some of the dye out; run-off here will be particularly noticeable when you’re trying to keep the colors in your hair separate from one another. [2] X Expert Source Karen LeightProfessional Hair Stylist Expert Interview. 13 November 2020. Wear a shower cap or pin your hair up out the way to protect it on days you don’t want to wash your hair.
If your hair’s getting too dirty with fewer shampoos from fewer showers, try out a dry shampoo to keep your hair clean in those interim periods. Or, you can also try rinsing and conditioning your hair to get rid of excess oils and dirt between shampoos.
If you usually shower every day, try transitioning to every other day. Or: wear a shower cap to protect your color on the days you’re only washing your body. To supplement this strategy, you can try adding a shower filter specially designed to cut down on mineral content in your water. Minerals like iron and lime are particularly harsh on dyes. This advice will be especially relevant if you’re looking to stretch out the timeline on your semi-permanent and demi-permanent hair dyes, as they’re intended to wash out around 12 and 24 shampoos, but keep in mind that this is just an estimate.
If your hair’s getting too dirty with fewer shampoos from fewer showers, try out a dry shampoo to keep your hair clean in those interim periods.
Focus on the crown of your head with the sunscreen, as it receives the most sunlight. You could also look for a shampoo and/or conditioner that contains sunscreen, which is common in color-safe products.