Final answer:
If the desired amount of lift is not achieved using a single-process color in hair coloring, there are a few options that may be required. One option is to use a different color formulation that has a higher lifting power. Another option is to use a pre-lightening step before applying the color, which involves bleaching the hair to lighten it before applying the desired color. Additionally, if the desired lift is not achieved with a single-process color, a different technique called double-processing can be used.
Step-by-step explanation:
If the desired amount of lift is not achieved using a single-process color in hair coloring, there are a few options that may be required. One option is to use a different color formulation that has a higher lifting power. For example, a hair color with a higher concentration of oxidant may be used to achieve more lift. Another option is to use a pre-lightening step before applying the color, which involves bleaching the hair to lighten it before applying the desired color.
Additionally, if the desired lift is not achieved with a single-process color, a different technique called double-processing can be used. In double-processing, the hair is first lightened with a bleach or lightening agent to remove the existing pigment, and then the desired color is applied to achieve the desired lift. This technique is commonly used when a significant color change is desired.
Overall, achieving the desired lift with hair coloring may require experimenting with different color formulations, pre-lightening, or using a double-processing technique.