Final answer:
Oxidative colors are hair color products mixed with a developer creating a permanent color change. They involve a complex chemical process resulting in large dye molecules that remain within the hair shaft.
Step-by-step explanation:
Hair color products that are mixed with a developer to create a chemical change are called Oxidative colors. Oxidative color is permanent hair color, meaning that the hair's structure has been chemically altered. The process of creating permanent hair coloring requires three components: the dye precursor such as 1,4-diaminobenzene or 2,5-diaminotoluene, a coupling agent, and an oxidant. The process involves the oxidation of the dye precursor to a quinone state, reaction with a coupler compound, and then further oxidation to produce the final dye. This results in larger dye molecules being trapped inside the hair shaft, ensuring the longevity of the color.
Other types of hair color products include direct dyes, semi-permanent colors, and temporary colors. Semi-permanent colors can't lighten hair and wash out over time. Temporary colors, often called 'rinses', are applied during a shampoo and washed out at the next hair wash. Plant-based dyes like henna are also used but work differently from oxidative colors.