Oklahoma Cosmetology Board Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

The type of hair color that typically lasts longer than semi-permanent options is permanent color. This is because permanent hair color contains a developer that helps to open the hair cuticle, allowing the color molecules to penetrate deeper into the hair shaft. Once these molecules are inside, they bond with the hair structure, resulting in a color that can last through multiple washes and will gradually fade only over time.

In contrast, semi-permanent colors sit on top of the hair cuticle and do not require a developer. They are designed to last for a shorter period, usually around 4-6 weeks, as they gradually wash out. Temporary colors are even less durable, often lasting just a few shampoos before completely disappearing. Vegetable dyes may offer some color benefits but are not as long-lasting or consistent as permanent hair color and may also fade more quickly depending on the hair's porosity and other factors. Non-oxidative colors do not penetrate the hair cuticle as deeply as permanent colors, leading to even less durability.

Thus, permanent color is the most enduring option available, making it the correct choice.