On the In_Between Days, Use a Color_Safe Dry Shampoo on Color_Treated Hair : To help keep color_treated hair looking fresh, flip your hair over and spray dry shampoo at the roots to soak up oil. After Coloring, Wait 2 Days Before You Shampoo : When you color your hair, wait at least 48 hours to shampoo, preferably longer. If you can go three or four days before shampooing, even better. This will give the color plenty of time to set. When You Don’t Shampoo, Keep Your Hair Dry in the Shower : During those off days, wear a shower cap to keep your color_treated hair from getting wet while showering as this can cause some color to fade. Or, pull your hair up into a loose bun or a ponytail to protect it from getting wet.
The Good Housekeeping Institute breaks down why: "Other than henna, any commercially available hair dye store_bought for home use or found in salons uses chemical actives for them to work," says Birnur Aral, Ph.D., Director of the Good Housekeeping Institute's Health, Beauty and Environmental Sciences Lab. "By and large, these chemicals are synthesized substances." Even when the packaging claims to be all_natural, organic or chemical_free which is literally impossible because everything, including organic things, are made of chemicals that could basically be an outright lie. This is because the FDA can't do anything about the use of these terms regarding cosmetics.