hair structure theory for hair color | 2024

hair shaft breakdown: cuticle, cortex, medulla, diameter, and melanin. explaining what these are and how they affect hair color. milady chapter 21, page 671, if you are in cosmetology school. key points: •hair has three main components: cuticle, cortex & medulla •the cuticle is the outermost layer •the cuticle contributes up to 20% of the overall strength of the hair •temporary hair colors stain the cuticle (physical change) •permanent hair colors make a chemical change (inside the cortex) •the cortex contributes up to 80% of the hair strength •texture is the diameter of an individual hair strand (large, medium, small or coarse, medium and fine) •melanin is responsible for the hair's overall color and is distributed differently according to texture •melanin granules in fine hair are grouped together more tightly so the hair color takes faster and appears darker •melanin granules in coarse hair are larger in diameter and spaced further out; hair color can take longer to process and be more resistant to color •the medulla (often called the pith or marrow) is the middle layer that serves no purpose in hair color the medulla is missing in most people with fine or blonde hair my main channel: ‪@BrittneeAlexus‬ timestamps: cuticle: 0:11 cortex 2:41 melanin: 3:00 gray hair: 4:33 medulla: 5:00 recap: 5:21 hair color theory video:    • hair color theory | 2024   website: www.brittneealexushair.com