West Virginia Barber Practice Exam

Manufacturers color swatches or a color ring is used to identify the hair's natural level of color. The other options are incorrect because A) Hair's dyed level can vary from person to person depending on their hair type and previous treatments, while color swatches provide a standardized reference point. C) Scalp's condition may affect how color appears, but it is not related to identifying the hair's natural level. D) Hair's porosity may also affect how color appears, but it is not related to identifying the hair's natural level.