Empire Beauty Schools Haircoloring Practice Test

Fine hair typically requires a lower developer volume for color treatment because it is more porous than other hair types. The increased porosity in fine hair means that it can easily absorb color, potentially leading to over-processing or damage if a high developer volume is used. Using a lower volume allows for better control over the color saturation without risking excessive lightening or compromising the integrity of the hair.

Coarse hair, on the other hand, has a thicker cuticle layer and usually needs a higher developer volume to ensure the color can penetrate effectively. Curly hair can vary widely in porosity and texture, so it doesn't have a definitive requirement related to developer volume applicable to all curly hair. Lastly, the idea that all hair types require the same volume doesn't align with the diverse characteristics of different hair types, making it important to tailor the developer volume to the specific needs of the hair being treated.