Views: 0 Author: Site Editor Publish Time: 2025-11-22 Origin: Site
The pursuit of smooth skin remains consistently strong, and coupled with continuous innovation and upgrades in beauty technology, the application of diode laser hair removal devices has grown rapidly worldwide, especially in Europe, North America, Asia, and the Middle East. These devices have become essential equipment in modern beauty salons and dermatology clinics.
When choosing a laser hair removal device, you may notice that many beauty equipment suppliers emphasize that their devices include a cooling system. Is this a worthwhile selling point? Why are cooling systems necessary in laser hair removal devices? Are they really that crucial?
Before answering these questions, let's review the basic principles of laser hair removal.
When we use a diode laser hair removal device, the specific wavelength of light it emits penetrates the epidermis (outer layer of skin) and reaches the dermis, where it is absorbed by the melanin in the hair shaft and hair follicle (hair follicle stem cells and dermal papilla are the "nutrient source" for hair growth).
After absorbing the light energy, the melanin instantly converts it into a large amount of heat energy, generating localized high temperatures (up to 70°C or higher). This high temperature irreversibly damages the hair follicle tissue, rendering it unable to regenerate hair. This is why diode laser hair removal devices are so efficient at removing hair.
However, this sudden increase in temperature can burn the skin. So how can we heat only the deep hair follicles without burning the surface skin? This is the significance of the invention of the cooling system.
There are three key issues regarding heat distribution when lasers are applied to the skin:
The basal layer of the epidermis also contains melanocytes. Without protection, epidermal melanin competes with hair follicles for light energy, leading to burns. People with darker skin tones have more melanin in their epidermis, increasing the risk of thermal damage.
Pain nerve endings in the skin are mainly distributed in the epidermis and superficial dermis. When hair follicles are heated, heat is conducted upwards to the epidermis, causing a strong burning sensation.
Sufficiently high energy is needed to completely destroy hair follicles. However, higher energy increases the risk of pain and burns to the epidermis. Without cooling, the effective energy limit is constrained by pain and safety.
The emergence of cooling systems perfectly solves the contradiction that "hair follicles need high temperatures and epidermis needs cooling," thus effectively mitigating the risks customers face during hair removal and ensuring the comfort and safety of the treatment.
Cooling systems play several crucial roles in laser hair removal:
Laser energy heats not only the hair follicles but also the surrounding skin, easily causing thermal damage.
Cooling the epidermis before, during, and after laser emission lowers its temperature, preventing it from absorbing excessive energy and causing burns. It also helps reduce the risk of side effects such as burns, blisters, and pigmentation changes.
Low temperatures temporarily inhibit the sensitivity of nerve endings, numbing them to heat. This significantly reduces or even eliminates the burning and tingling sensations during treatment, making the procedure more comfortable and painless.
Because the epidermis is protected, this comfort allows operators to use higher laser energy settings (energy density), resulting in faster and more effective hair removal.
Effective cooling is essential for using higher energy lasers.
Higher energy settings more effectively destroy hair follicles, leading to better long-term hair removal results.
Effective cooling makes laser hair removal safer for people with slightly darker skin tones (Fitzpatrick III-IV) and reduces their risk of hyperpigmentation or hypopigmentation.
There are many types of built-in cooling systems in laser hair removal devices, mainly employing the following cooling technologies:
This technology rapidly sprays a coolant onto the skin surface before the laser pulse is emitted. This rapid cooling method is extremely efficient, protecting the epidermis to its optimal state the instant the laser is emitted, thus improving treatment comfort. It is particularly suitable for professional fields using extremely high energy for treatment.
This is the most common basic cooling method, often used in low-end or older models.
The instrument has a high-speed fan inside, which uses airflow to physically dissipate heat from the laser tube and internal components. Because it primarily cools the internal components, its cooling effect on the skin surface is indirect and weak.
Its structure is simple and inexpensive, effectively preventing damage or shutdown due to overheating. However, the user may hear the fan, but will feel almost no cooling effect on the skin.
This technology utilizes the Peltier effect. When an electric current passes through a circuit composed of two different semiconductors, heat is absorbed (cooled) at one end and released at the other. The instrument uses a semiconductor cooling pad to maintain the metal surface of the treatment head at a consistently low temperature of 5°C to 15°C, providing a noticeable and continuous cooling sensation to the skin.
Its cooling effect is powerful, stable, and long-lasting, effectively relieving pain and significantly improving comfort. It also effectively protects the epidermis, allowing for the use of higher energy levels, enhancing both efficacy and safety.
Some laser hair removal devices employ compressor-based cooling technology, using a circulating coolant to cool the laser handpiece or individual components. This ensures efficient cooling without compromising laser effectiveness.
Newangie's ice laser hair removal devices are equipped with a TEC (Transmission Electrode Therapy) and compressor cooler, minimizing the risk of burns during the procedure. This is one reason why many beauty salons and distributors choose Newangie laser hair removal devices.
Those who have undergone laser hair removal treatment are likely familiar with the operator applying a thick layer of cooling gel to your skin before the actual treatment. This gel forms an extra protective layer between the laser and the skin, preventing the skin from absorbing excessive heat. It's suitable even for people with sensitive skin or those prone to redness.
The cooling gel, combined with the device's built-in cooling system, provides double protection, significantly reducing the burning sensation and heat damage during the hair removal process, offering customers a comfortable and painless experience.
At Newangie, every laser hair removal device features an advanced dual cooling system—a guarantee of quality and a commitment to customer safety.
Choosing a diode laser hair removal device with a highly efficient cooling system means you're choosing a safe, effective, and comfortable complete solution. It directly addresses the fundamental thermal imbalance in laser hair removal, providing the technological guarantee for achieving your dream of "painless and efficient" hair removal.
If your budget allows, this should be your primary consideration when making a purchase decision, as safety is fundamental to the operation of all beauty equipment.
For more information on advanced diode laser hair removal technology, we recommend reading Newangie's blog.
