Download Depilatories

Depilatories
Introduction:
Preparations for the removal of unwanted hair
have been known for thousands of years.
A distinction must be drawn between:
-The mechanical removal of hair (Epilation)
- Electrolysis
-The chemical depilation
1
I- Epilation


The effect may be slightly longer
lasting, since the epilated hair take with
them the hair bulbs or the hair papillae,
before the hair starts growing in the
follicle and reaches the surface of the
skin.
Painful, cause skin damage and
subsequent infection.
2
I- Epilation (temporary)





Based on mixtures consisting essentially of
rosin and beeswax and some times with liquid
paraffin and paraffin wax.
Camphor is often included for its cooling effect.
Local anesthetic, e.g. benzocaine to reduce the
pain
Antibacterial compound will reduce the chance
of infections
Home made epilating formula based on
caramelized sugar , lemon juice and glycerin.
3
II- Electrolysis (permanent)


By inserting a needle into the hair
follicle and complete destruction of the
hair root by means of a weak DC
current.
This method is not practical as it is
practiced in beauty salons and by some
dermatologists, expensive and time
consuming, since every hair must be
treated individually, 25-100 hairs per
sitting.
4
III- Laser hair removal


Highly controlled flashes of laser beams are
selectively absorbed by the pigment in hair follicles
lying below the surface of your skin. The absorbed
light heats the hair follicle, which damages and
destroys the regrowth potential of the follicle (as
opposed to waxing which only slows regrowth
potential)- all without damaging surrounding tissue.
Because hair follicle pigment is the lasers target
tissue, white hair is not substantially effected. Hair of
any color is effectively killed.
5
III- Laser hair removal


Hair follicles are usually in different growth cycles at
different times in relation to one another. Since the
follicle must be in its active growth phase in order to
be destroyed by the laser, several (3 - 6 or more)
treatments spread over several months are required
to assure the destruction of all hair follicles.
Permanent hair reduction does absolutely occur,
unlike painful waxing & excruciating electrolysis! Also,
the majority of patients experience a very large
reduction in acne after hair follicle count is reduced.
With hair follicle reduction, there is less skin surface
and hiding pulse for skin bacteria to hide. The result
is softer, smoother skin with better complexion.
6
IV- Chemical Depilation
The chemical breakdown of hair without
injury to the skin.
 Advantages:
- avoid danger of cutting the skin
- can use it in complicated contours
- discourage the re-growth of hair if
used regularly (allow hair removal at a
deeper level).

7
III- Chemical Depilatory
Disadvantages:
- since the hair is of similar composition to the
skin , the horny layer o the skin will also be
attacked.
- very high pH
 Requirements:
- efficient in removing hair in 5-15 min.
- odorless
- non irritant to the skin

8
III- Chemical Depilatory


Active component (alkaline reducing
agent): Strontium sulfide, Sodium stannites
were used in the past, but the majority of
depilatories avialable today are
Thioglycollates.
Thioglycollates: calcium thioglycollate with
calcium hydroxide (pH 10-12.5), are less
odor, take longer time to act (5-15min),
stable, non toxic and can be used on the face
9