Final answer:
High-lift tints are mixed with a double amount of developer, which acts as an oxidant in the hair coloring process that involves several steps, including oxidation and reaction to form the dye.
Thus the corret opction is:1
Step-by-step explanation:
High-lift tints are designed to achieve lighter colors and are generally mixed with a double amount of developer. The reason being, permanent hair coloring, which includes high-lift tinting, requires an oxidant, which acts as the developer.
In the coloring process, the oxidant, usually hydrogen peroxide, helps to open the hair cuticle so the tint can penetrate the hair shaft and dispel the natural color, allowing the new color to bond to the hair shaft.
The hair coloring process typically involves the oxidation of a diaminobenzene derivative to a quinone state, reaction with a coupler compound, and a final oxidation to produce the desired dye.
This process is carried out under basic conditions. Using two parts of developer in the mixture enables a greater degree of lift or lightening of the hair's natural pigment, which is necessary when using high-lift tints to achieve significantly lighter shades.