dyes alone. Compound dyes tend to be unpredictable and they are incompatible with other chem-
ical services in the salon.
Refer to "Infection Control and Safety" on page 523 to learn how to test for metallic salts.
Hair Color Essentials
To perform a professional color service, you need a selection of products, implements and equip-
ment. Color service products are produced by many different manufacturers, are disposable and
must be frequently replaced. Material Safety Data Sheets (MSDS) for all products used in the salon
must be available. Color service implements are the hand-held tools you use. They must be disin-
fected or discarded after every use. Color service equipment includes the furnishings and provisions
necessary to provide a professional color service.
Hair Color Products
PRODUCT
FUNCTION
NONOXIDATIVE
Temporary
Adds tonal value or highlights to specific areas
Semi-Permanent
Adds tonal value and imparts shine, but does not lighten the
natural melanin; gradually fades, lasting up to 4-6 shampoos;
can have a longer lasting effect on porous hair or when heat is
applied; can have a permanent effect on chemically relaxed
and lightened hair
OXIDATIVE
Long Lasting Semi-Permanent/
Adds tone or darkens the existing color but does not lighten the
Demi-Permanent
natural melanin or previously colored hair; retouches may be
required every 4-6 weeks
Permanent
Tones, darkens or lightens natural melanin in a single process;
cannot lighten previously colored hair; remains on the hair
until it is cut off or removed by chemical means such as with a
lightener or color remover; retouches may be required every
4-6 weeks
LIGHTENERS
On-the-Scalp Lightener
Lightens (decolorizes) melanin; used to achieve colors not
attainable with a single process; gentle enough to be used on
the scalp
Off-the-Scalp Lightener
Lightens (decolorizes) melanin; used for off-the-scalp tech-
niques such as highlighting, surface painting, frosting cap or to
achieve colors not attainable with a single process
HAIR COLORING
1
3
517
