What does the term "Line of Demarcation" refer to in haircoloring?

The term "Line of Demarcation" specifically refers to the visible line that appears between two different colors of hair, typically when there is a noticeable contrast from the natural hair color to a colored section. This line can become particularly prominent when hair color is applied, especially if the hair has grown out since the last coloring, causing an obvious separation between the color-treated hair and the new, uncolored growth.

Understanding this concept is vital for haircoloring professionals because it informs techniques for achieving a more blended and seamless look. Properly addressing and minimizing the line of demarcation is essential in color application, as clients often seek a natural transition rather than a stark contrast between shades. Knowing how to assess and manage this line can significantly affect the overall satisfaction of the client with their hair coloring results.