hair straightener / WIKI
A hair iron or hair tong is a tool used to change the
structure of the hair with the help of heat. There are two general
kinds. Straightening hair irons, used to straighten the hair, and
curling irons, used to make the hair curly. Straightening irons may also
be called flat irons, but not to be confused with clothes flat irons.
Context ususally can separate the two.
Hair straighteners: The first hair straightener was invented by Madame
C.J. Walker using chemicals of scalp preparation and lotions to
straighten the hair. Unfortunately, using this invention soon led to
damaged, scorched hair from all the chemicals that were added, but as
technology improved, so did the hair straighteners. Years later, M.
Marcel Grateau invented heated metal hair care implements such as hot
metal combs. Using the metal hair care, the straightener slid easier
through the hair, causing less damage and dryness as previously used
techniques. After this invention, ceramic and electrical straighteners
were introduced, allowing adjustment of heat settings and straightener
size. Another method of hair straightening is Japanese Hair
Straightening, which acts as a sort of "anti-perm" and is available at
most salons. A new trend is the use of tourmaline being crushed into
irons and other hair appliances since they generate many negative ions
which have positive effects on hair. Most high end salon or professional
brands use tourmaline and/or ceramic hair irons.
Less expensive brands may use aluminum plates, however aluminum is not
as good for the hair, and is less effective. Higher quality irons use
ceramic plates and even higher quality hair straighteners use ceramic
tourmaline plates.
A number of products may be used to stop the hair from drying when it is
straightened. Straightening may cause split ends and thinning of the
hair.
Hair straighteners must never be used on wet hair unless they are
specified as wet to dry straighteners. Even then the hair cannot be
soaking wet. Straightening when hair is wet causes the hair to burn.
As well, there are several different types of hair straighteners, such
as ionic, ceramic, and glass.
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