Hair removal using a long-pulsed alexandrite laser.

Histological hair removal study by ruby or alexandrite laser with comparative study on the effects of wavelength and fluence

“…Those outputs have been recommended by the manufacturers as being suitable for epilation. 4,8,10,12 However, according to our results at different output conditions, damage caused by the ruby laser at 18 J/cm 2 was nearly equal to damage caused by the alexandrite laser at 17 J/ cm 2 , and the damage caused by either laser at 14 J/cm 2 was quite similar. It has been reported that since the absorption of the alexandrite laser into melanin is small compared with the wavelength of the ruby laser, and since it causes less damage to the epidermis, it is safer to use on skin types III and IV.…”

“…Laser beams employed for laser epilation can be classified briefly as ruby lasers, 4,[6][7][8]11,18 alexandrite lasers, [10][11][12] Nd:YAG lasers, 11 or diode lasers. 18 Since the beams are highly absorbed by the melanin in hair, those chromophores are considered to be suitable targets.…”

“…The apparatus used were a ruby laser with a normal mode (Chromos 694, ICN PhotonIcs, UK) 4,6-9 and an alexandrite laser (LPIR, Cynosure, USA). [10][11][12] Both had a laser light source with pulse widths of 1 ms and 20 ms and wavelengths of 694 nm and 755 nm, respectively. The spot size was 7 mm in both cases.…”

Hair induction after laser-assisted hair removal and its treatment

“…This amount of hair increases until menopause occurs. 16,17 The pattern of hair growth observed in the hair induction phenomenon does not resemble that of hirsutism, hypertrichosis, or the age-related normal development of terminal pigmented hair in certain body areas observed in many individuals as previously noted.…”

Development of a Novel Automated Hair Counting System for the Quantitative Evaluation of Laser Hair Removal

“…2 Its proven safety, permanent hair removal function, and simple and painless application are the advantages of LHR over conventional hair removal treatments such as tweezing, plucking, and electrolysis, and have led to its wide public acceptance. [3][4][5][6][7][8] All LHR devices are based on the principles of selective photothermolysis and the extended theory of selective photothermolysis. 9,10 The laser released from the light output window of the device reaches the hair follicle and damages it without causing collateral damages to the nearby environment.…”