New Evidence Confirms Efficacy and Safety of Our High‑Power Triple Wavelength Diode Laser

Facial hair removal on darker skin types has long been a challenge in aesthetic practice. Traditional single‑wavelength diode lasers often require reduced fluence to avoid complications, which limits results—especially when treating very fine, lightly pigmented hair on the face.

A recently published clinical study in the Journal of Cosmetic Dermatology has shown that Sinclair’s high‑power triple wavelength diode laser (810, 940 and 1060 nm) delivers excellent outcomes in these challenging cases, with an impressive combination of efficacy, safety and patient comfort.

Study Design

The single‑centre retrospective study, led by Dr. Anuj Pall and Dr. Gregorio Viera Mármol (Sinclair), followed 23 Asian patients with Fitzpatrick skin types IV and V who had fine or less‑pigmented facial hair.

• Treatments were carried out using the Primelase 4000 W triple‑wavelength applicator in stamping mode with fluences between 18–24 J/cm².

• Each patient underwent 6–11 sessions over several months.

• Results were measured via hair counts from high‑resolution photographs and assessed on the Global Aesthetic Improvement Scale (GAIS).

• To deepen insights, 3D thermal simulations were performed, modelling follicle heating and epidermal protection.

Results

The outcomes speak for themselves:
Average hair reduction: 66% after the course of treatment (range 17–94%)
High patient satisfaction: GAIS scores of 4–5 out of 5 in nearly all cases
Safety confirmed: No adverse events such as paradoxical hair growth, hyperpigmentation or burns were reported
Durability: Some patients maintained results with no regrowth for over 3 years.

Why Triple Wavelength?

Unlike traditional 755/810 nm combinations, the 810, 940 and 1060 nm blend penetrates deeper with less scattering, ensuring uniform heating of the follicle while keeping the skin protected. The 940 and 1060 nm wavelengths are also absorbed by water and blood, further enhancing follicular damage without overstressing the epidermisJ of Cosmetic Dermatolo….

What This Means for Practitioners

For clinics treating patients with Fitzpatrick IV–V skin tones and fine facial hair, Sinclair’s high‑power triple wavelength diode laser offers:

• Improved efficacy where standard devices struggle

• Faster, safer treatments thanks to high power and large spot sizes

• Consistent patient satisfaction and confidence in outcomes

At Sinclair, we are proud to support practitioners with devices backed by real‑world data and peer‑reviewed science.