It really depends on the formula, but generally speaking, you should use a color-depositing shampoo two to three times a week to achieve the desired results. Some formulas actually cleanse your hair like regular shampoo, and others are meant to be used after washing and before conditioning. Maybe you dye your hair at home, see a colorist at a salon, or just want to tweak your natural hair color. Do not apply this product if you have ever experienced any reaction after colouring your hair or you have experienced a reaction to a temporary 'black henna' tattoo in the past. For instance, professional hairstylist Shelly Aguirre says, "Traffic-stopping silver is all about getting rid of any yellow or dull-looking [tones] to make the gray hair shine.Further investigation is needed, but if true, this could mean that they not only help to trigger the anagen phase but also to extend it.

Another claimed benefit of copper peptide for hair treatments is that they stimulate blood flow to the affected areas. For drier, more porous hair , less frequent shampooing 1-2 times every 7-10 days is ideal to avoid stripping natural oils.The colour range may be less extensive than traditional box dyes but if you're not too keen on the result, then you can wash it out a little easier.