Is there a product(shampoo/conditioner) that is specifically to prevent fading of dyed black hair?

i have dyed my hair black for about a year now and i love it, but after about 2 weeks with the color, it looks like i've dyed it a reddish brown because all of the black color has completely faded out. this is annoying on another level as well because everytime i dye my hair, i cannot just dye my roots because the whole head of hair has faded. this makes me hair very dry. i really need to find product specifically formulated for dyed black hair, to keep the color. thanks!Is there a product(shampoo/conditioner) that is specifically to prevent fading of dyed black hair?
You can always look for shampoo for color treated hair. There is really no good way to prevent your hair from letting go of the dye. Rough shampooing can strip color or dry out hair. Since it's probably not healthy to wash your hair daily since it has been treated, you could try shampooing every other day.Is there a product(shampoo/conditioner) that is specifically to prevent fading of dyed black hair?
Dove has some new shampoos and stuff for people with dark hair. Also you can use John Friedas products for brunnetes.
A good answer to this question depends on whether you are doing your hair at home. I assume you are so I will help on that assumption. When you apply color as a retouch it's important not to overlap the color. Even if all your hair is faded, you apply color to new growth first and pull it thru the ends for only the last few minutes. You should probably be using semi-permanent color until your hair is healthier. It is fading because it's damaged. You may want to go to a reputable stylist to get your hair conditcioned and colored and then work on maintaining the color at home. The color care products over the counter are ok but in the salon I use Redken, Sexy Hair and Tigi color care the most with excellent results. Good luck.
Just make sure that you're using a professional system for colored hair. The pH of many grocery store items is too high and each time you shampoo, you're opening the cuticle of the hair so that the molecules of color can escape and go down the drain! You may also consider using a colored shampoo to keep the color vibrant. Paul Mitchell makes an entire line of colored shampoos as well as Artec (The original colored shampoo line!). Aveda makes one called Black Malva which is also popular. Finally, consider a leave in conditioner with both UVA and UVB protection. Good luck!