Final answer:
The hair color type that uses a low volume hydrogen peroxide to deposit color without lightening hair is Demi-permanent hair dye. It provides a longer-lasting color than semi-permanent dyes and is less damaging compared to permanent dyes, making it a suitable option for enhancing natural hair color and blending away grays. Therefore, the correct option is C.
Step-by-step explanation:
The type of hair color that uses a low volume hydrogen peroxide and can only deposit color or add tone to the hair, without lightening the existing hair color, is c) Demi-permanent hair dye. This type of hair color typically uses a developer with a lower concentration of hydrogen peroxide (between 1.9% to 2.2%), which does not have enough strength to significantly lighten hair. Demi-permanent hair dye is designed to fade over time and will usually last about 20 to 28 shampoos before it starts to wash out gradually.
Unlike semi-permanent hair color, which simply coats the hair shaft and typically lasts from shampoos until it completely washes out, demi-permanent hair dye penetrates the hair shaft to a slight extent which results in a longer-lasting color compared to semi-permanent dyes. It is also less damaging than permanent hair dye since it does not fully penetrate the hair shaft and does not require a high volume of peroxide that would cause more significant changes in hair structure. It's a great option for those looking to enhance their natural color or blend away initial signs of gray hair.