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Laser hair removal information

Electrolysis is using an electric current applied with a needle-shaped electrode to destroy living tissue, especially of hair roots. A laser is an electrical apparatus which produces light. Laser light is different from the light we encounter every day in two special ways.

Laser light is monochromatic. It has only one color, unlike white light which is composed of all colors.

Laser light is coherent. If we define light as electromagnetic radiant energy which produces a visual effect, light is basically a vibrating electromagnetic field. The term coherent means that all the vibrations are in the exact same direction and not in all directions, thereby causing the 'perfect' beam of light.

When laser light hits human tissue, it produces heat, similar to our own thermolysis. Where the laser produces its heat is dependent solely on what tissue absorbs the particular light. There are only 3 substances in human skin and hair follicles that can absorb light energy and be heated up :

water (found in all tissue)

blood

melanin

There are 3 laser methods being used today :

Thermolysis

Used with insulated probe. Capable of heating all water-containing tissue in all directions from the exposed parcel of the probe. How far you heat is dependent on timing and intensity. What you heat depends on how well you have inserted the probe. You also have the advantage of using an inexpensive, thin, pointed probe that facilitates good insertions.

Compare this with the thicker, probe-type laser being developed, which is inserted into a follicle using an expensive, delicate and questionably pointed laser probe that can only shine light in a very narrow, cylindrical pattern in front of it.

To destroy the dermal papilla would require much more accuracy than thermolysis, which, as we've mentioned, has a broader heating pattern.

Second type

A second type of laser being developed to destroy hair shines light from the surface of the skin down along the hair follicle to the root. It will be very difficult to accurately and repeatedly hit the dermal papilla, or bulb area, which is only one to several thousandths of an inch in diameter.

In most cases, you will end up destroying significant amounts of tissue all around the follicle, and only occasionally hit the dermal papilla. In essence, the ratio of normal tissue to follicular tissue will be quite high and a significant amount of pain will be experienced.

Carbon Lotion Method

Carbon containing lotion to be rubbed into the hairy skin, hoping that the carbon particles will coat the hair follicle with carbon.

The skin surface is then scanned with laser light which heats the carbon particles around the hair and upper follicle. The problem with this method is that the carbon particles cannot penetrate the follicle any deeper than the follicular infundibulum, and most will not get much beyond the skin surface because of the hair shaft and other cellular debris filling up the infundibulum.

As a result, some of the hairs will be singed off to create an effect not much different than that of chemical depilatories and certainly will not be permanent. This is a rather expensive temporary means of epilation.

Source: Laser epilation - a new form of hair removal by Bethany Howlett

 

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