Cool How To Make Black Hair Color Last Longer Ideas. 2) many shampoos have a high ph which acts like an alkalizing agent in the hair, thus allowing dye to bind with natural pigments. Celebrity colorist ryan pearl, who works at cutler salon in new york city, recommends waiting at least 24 hours before shampooing as this allows the dye to.

The dyeing process opens the cuticle layer of hair, which is where. Web in this blog post, we’ll discuss my favorite tips and tricks to help your hair color stay vibrant and beautiful for longer. Web your hair is in a delicate stage after a fresh color, which is why most colorists recommend waiting 48 hours before washing your hair.