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English, Introduction, How photo-epilation works – Philips fotodepiladora User Manual

Page 6: Hair growth, Working principle

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introduction

Congratulations on your purchase and welcome to Philips! To fully benefit

from the support that Philips offers, register your product at www.philips.

com/satinlux.

Hair removal with light is one of the most effective methods to get

rid of unwanted body hair with longer lasting results. It is completely

different from current home hair removal methods and Philips has been

investigating this method together with leading dermatologists for almost

10 years. You can now use this innovative technology comfortably in the

privacy of your own home, whenever you want.

This appliance is intended for removing women’s body hair on areas below

the neck:

underarms

bikini area

legs

The appliance is not intended for:

persons with a too light body hair colour (light blond, red, grey or

white body hair) or a very dark skin. See chapter ‘Preparing for use’,

section ‘Setting the light intensity’.

For more information about the SatinLux, see www.philips.com/satinlux.
how photo-epilation works

hair growth

Depending on age, metabolism and other factors, everyone’s hair grows

differently, but hair normally grows in three phases:

1 Anagen phase (growing phase)

The hair grows actively from the root. In this phase the concentration

of melanin is highest. Melanin is responsible for the pigmentation of the

hair. The more melanin there is in the root, the darker the hair is. Melanin

concentration is also the determining factor for the efficacy of this method.

Only hairs in the anagen phase are susceptible to treatment with light.

2 Catagen phase (degradation phase)

The hair growth stops and the root shrinks before the hair sheds.

3 Telogen phase (resting phase)

The old hair separates from the root and the new hair slowly pushes out

the old hair. The root remains at rest until the biological clock tells it to

become active again and grow a new hair (4). Hairs on an area of skin are

usually in different stages of the cycle of hair growth.
Working principle

The appliance removes hair by heating up the hair and root beneath the

skin. The melanin in the hair and hair root absorbs the released light pulses.

The darker the colour of the hair, the more heat can be produced. This

process stimulates the hair to go into the resting phase.

The hair now sheds naturally and the hair growth is inhibited.

Optimal hair removal cannot be obtained with a single session, since only

hairs in the anagen phase are susceptible to treatment with light. During

a treatment, hairs on the treated area are usually in different stages of the

cycle of hair growth.

To treat all hairs successfully and to prevent the hair root from becoming

active again, the treatments have to be repeated once every two weeks.

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