science
the smallest chemical part of an element
the innermost layer of the hair composed of round cells not all hair has this
what is- medulla
also known as the periodic strand test determines if the hair color is absorbing and processing evenly
what is- Processing strand test
produces brown to black pigments in the hair
what is- Eumelanin
the technique that allows for better hair color penetration by softening the cuticle; often used prior to coloring resistant and/or gray hair
what is - presoftening
a substance that is capable of dissolving another substance
what is- solvent
the process of new hair growing out from the scalp that has not been chemically altered
what is- new growth
ranges 0-6.9 on the PH scale
what is - acid
also known as hue- is the balance of color
what is - tone
also known as contributing pigment
what is - undertone
the simplest form of matter it can not be broken down into a simpler substance
what is - Element
the ability of hair to absorb moisture
what is- porosity
Also known as a Catalyst or Hydrogen peroxide, an oxidizing agent added to hair color or lightener that assists in the development process
what is- developer
also known as reverse hair color is the process of returning hair to its natural state or desired level/color
what is- tint back
the 3 basic colors- red, yellow, blue- from which all other colors are produced
primary colors
the suspension of one liquid in another liquid where they do not mix
what is- Emulsion
the medical term for gray hair
what is- canities
a gas with a strong odor made up of nitrogen and hydrogen
what is - Ammonia
the degree of lightness or darkness of a color
what is- level
also known as patch test, applying a small amount of product to the skin to check for sensitivity and /or allergic reaction to a product or chemical
what is- predisposition test
the chemical reaction that occurs when oxygen is released from a substance; this reaction assists in the development of color on the hair
what is - Oxidation
cuticle scales are flat causing minimal liquid absorption
what is - Resistant hair
ranges from 7.1 to 14 on the PH scale
what is- alkaline
used to equalize porosity and replace missing pigment in one application
what is- filler
the application of demi-permanent or semi-permanent hair color to add shine and or refresh color
what is- glaze