What it is: Joico Vero K-Pak Chrome Demi-Permanent Hair Dye is a gentle hair color with fantastic color payoff. It comes in a wide variety of colors. Choose from both warm and cool-toned reds, blondes, browns, and vibrant fashion colors!What it does: This demi-permanent dye works by depositing color molecules on top of the hair's cuticle. It does not lift the hair at all. You can use it to darken hair, tone pre-lightened hair, add shine, or cover even the most resistant grays.What else you need to know: The dye was formulated with absolutely no ammonia, which means that it is remarkably gentle to your strands. Mix it with a developer according to the instructions on the product packaging for the best results.