If you are looking to introduce more aesthetics treatments to your clinic or are just starting out and researching the most popular treatments, it’s important to know which machines to invest in. With the wide range of devices available for every type of aesthetics treatment, you need to do some research into the terminology and scientific theory behind each device to understand how it works.
At EmTECH we provide transparent advice and training for a wide range of treatments and using the latest aesthetics technology. From Laser Hair Removal or Tattoo Removal to CO2 Skin Rejuvenation or HIFU technology, it’s important for our clients to understand the technology to provide safe and effective treatments. Below we give you a general overview of some aesthetics devices and how they work.
Laser Hair Removal
Diode laser hair removal is a highly effective, long-term hair reduction treatment that uses concentrated light to target melanin in the hair follicle, permanently disabling it. It is widely considered the gold standard because it safely treats all skin tones—including darker skin—with minimal discomfort.
How it Works
The treatment relies on the principle of selective photothermolysis, where the laser energy converts to heat specifically within the hair root, destroying the follicle while leaving the surrounding skin undamaged. Modern diode machines operate at specific wavelengths (commonly 810nm, 1064nm, or a combination of three) to penetrate deep into the skin.
IPL Hair Removal
IPL (Intense Pulsed Light) targets melanin (pigment) in the hair root. The device emits broad-spectrum light that converts to heat, disabling the follicle and stunting future growth. Because hair grows in cycles, multiple sessions are needed to successfully treat all follicles.
Laser Tattoo Removal
Laser tattoo removal uses concentrated light beams to penetrate the skin and target ink. The laser’s intense energy shatters the large tattoo ink particles into tiny, manageable fragments. Your body’s immune system then naturally flushes these microscopic particles away, causing the tattoo to fade over several weeks.
Targeting the Ink: Specialized lasers (such as Q-switched or Pico lasers) emit rapid pulses of light that pass harmlessly through the outer layers of your skin.
The Shattering Effect: The tattoo ink absorbs the light energy in a fraction of a second. This rapid absorption creates a brief, intense heat or pressure wave that shatters the dense clumps of ink into microscopic pieces.
Immune System Disposal: Once the ink fragments are small enough, your body’s white blood cells (macrophages) encapsulate them. These cells transport the broken-down ink through the lymphatic system to the liver, where it is eventually processed and flushed out of the body naturally.
HIFU / High-Intensity Focused Ultrasound
HIFU targets deep skin layers by delivering concentrated sound waves beneath the surface. The waves generate localized heat (60°C–70°C) without damaging the outer layer. This controlled thermal damage triggers the body’s natural healing response, stimulating collagen production for firmer, tighter skin over several months.
How it works
Precision Depth: HIFU devices can penetrate up to 4.5mm beneath the skin, specifically targeting the Superficial Muscular Aponeurotic System (SMAS) layer. This is the exact foundational tissue tightened during a surgical facelift.
Thermal Coagulation: The focused ultrasound beams create tiny thermal coagulation points. This deep tissue heating is what jump-starts the body’s natural repair process.
Collagen & Elastin Growth: By sending a healing signal, fibroblasts are stimulated to produce fresh collagen and elastin proteins, which naturally rebuild the skin’s structural support.Fat Reduction: When used on the body or jowls, higher energy levels can disrupt subcutaneous fat cells. The body’s lymphatic system naturally processes and eliminates the destroyed fat cells.
CO2 Laser
CO2 (carbon dioxide) lasers emit a concentrated beam of light at a 10,600 nm wavelength, which is strongly absorbed by water in the skin. The light energy instantly vaporizes the damaged, superficial layer of the skin (epidermis) and safely heats the middle layer (dermis), triggering your body’s natural wound-healing process to stimulate fresh collagen and elastin production.
This process tightens the skin and significantly improves texture, reducing wrinkles, sun damage, and scars. The two main approaches include:
Fully Ablative CO2: Vaporizes the entire top layer of skin for dramatic, permanent facial rejuvenation, though it requires a longer downtime (up to 2–3 weeks).
Fractional CO2: Delivers the laser in a pattern of microscopic columns. It leaves the surrounding tissue intact, which speeds up healing and reduces recovery times while still delivering significant results.
RF / Radiofrequency
Radiofrequency (RF) aesthetics uses controlled electromagnetic waves to heat the skin’s deeper layers. This localized heat safely contracts existing collagen fibres and triggers a natural wound-healing response, which stimulates fibroblast activity to produce fresh collagen and elastin, resulting in firmer, tighter skin.
The science of RF skin tightening relies on controlled thermal energy to rejuvenate the skin without damaging the outer surface:
1. How the Energy Creates Heat
An aesthetic Radiofrequency device applies alternating electrical currents to the skin. As these waves pass through the tissue, they cause the water molecules in your skin cells to rapidly rotate. This rapid oscillation creates friction, which safely and gently transforms electrical energy into deep thermal heat.
2. Dermal Heating & Collagenesis
The heat generated reaches roughly 40°C to 45°C in the dermis. This elevated temperature initiates two major physiological responses:Immediate Contraction: The heat causes existing, aged collagen fibers to immediately tighten and contract, providing an initial lifting effect.
Collagen Production: The body recognizes the heat as a controlled injury and triggers its natural healing response. This stimulates specialized cells called fibroblasts to produce new, healthy collagen and elastin over the following weeks and months.
Utilising Aesthetics Technology
With the huge selection of aesthetics machines to choose from, understanding the technology behind each machine is vital to choose the right device for your clinic or salon. Many aesthetics devices will use the technology as described above, but combining the technology with another treatment such as microneedling or body massage for a wider range of applications.