Yeah I use the same Loreal Professional Colorist Collection (use to be called Artec), it slightly helps cover my grays but helps keep my color brighter.I started using Loreal Professional Line (used to be called Artec) color depositing shampoo to keep my color from fading quickly and so far I like it. My color is more vibrant when I use it, suggested to use every other shampoo.
I don't know. It looks like it's doing something. I guess 'taking the edge off the grey' might be a good expression.Colored shampoos will take the edge off of your grey hair. Since the color in them is what is called a direct dye (Which is much like food coloring) it will add stain to the hair...pigmented or otherwise.