Terminology ... Formula is a mixture of haircolor products used to create the desired shade – the “recipe” used by the haircolorist to color the client/guest’s hair.
Gray Hair is the result of
a gradual decline in melanin production located in the cortex layer of the hair.
Cortex
Melanin
Haircolor is the melanin located in the cortex layer and/or the artificial pigments from actual haircoloring products that are responsible for providing color to the hair.
Highlighting is a special effects
service that lightens selected pieces of hair with the use of lightener and/or haircolor.
1
Hue is the general name for color.
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