Chengji Electronic Technology (Dongguan) Co., Ltd Company News

From the unbearable burning "follicle burning" to painless freezing point care, how a technology originated from a Harvard laboratory reshaped the global beauty industry.                                    In 1998, semiconductor lasers (diode lasers) were first developed and applied to hair removal. This innovation eventually established the "gold standard wavelength" for hair removal treatment - 810nm. The choice of this wavelength is not accidental: it is at the optimal balance point between melanin absorption efficiency and skin penetration depth, and can effectively destroy hair follicles without damaging surrounding tissues.   01 Early Challenges and Technological Breakthroughs Before the advent of diode laser hair removal devices, the hair removal field was dominated by ruby lasers (694nm) and alexandrite lasers (755nm). These first-generation devices used the high-energy "burning" concept to heat the hair follicles to 60-70 degrees Celsius, and the treatment process often caused severe pain, blisters and even burns to patients. Between 1995 and 1996, ruby lasers, alexandrite lasers, and neodymium-doped yttrium aluminum garnet lasers (1064nm) entered the market one after another, but the results were mixed. Researchers at Harvard University's Wellman Medical Optics Laboratory found that hair follicle melanin has a significant absorption advantage in the 800-810nm wavelength range, while the surrounding tissue has a lower absorption in this band. This discovery provides a scientific basis for the development of a new diode laser hair removal machine.   02 Establishment of the gold standard In 1997, Wellman Laboratory launched the first clinical study of a medical semiconductor laser hair removal device, marking the official entry of diode laser technology into the practical stage7. The following year, Lumenis, the world's largest medical laser company, launched a groundbreaking product - the LightSheer semiconductor laser hair removal system. This diode laser hair removal machine has three revolutionary innovations: Using 800nm wavelength square spot (9×9mm or 12×12mm) Equipped with contact gem cooling device Providing three pulse widths: 30ms, 100ms and automatic setting  The device significantly reduces the risk of epidermal damage and became the safest and most efficient hair removal solution at the time7. Dermatologist Wang Yifeng pointed out in his research: "The semiconductor laser hair removal system, due to its unique wavelength and cooling technology, has achieved the unity of permanent hair removal and safety assurance for the first time".   03 Continuous innovation and comfort revolution After 2000, the diode laser hair removal machine entered a period of technological explosion. The emergence of "freezing point hair removal" technology (SHR) represents a leap forward in the third generation of semiconductor laser hair removal.http://www.diodelaser-machines.com This innovation uses an 810nm wavelength and a special dual pulse design: the preheating pulse raises the temperature of the hair follicles to 40°C, and then the heating pulse rises to 45°C. Through the continuous action of 10 pulses/second, the hair follicles gradually lose their activity in a painless process. Another breakthrough during the same period was vacuum hair removal technology. This technology combines a vacuum negative pressure system with a semiconductor laser. After the skin is stretched and thinned, the distance between the light source and the hair follicles is shortened, the density of epidermal melanin is reduced, and energy absorption is maximized. The spot area of the treatment head is expanded to 22×35mm, and the treatment time is shortened by 50%-70%.   04 Scientific verification and effect optimization A meta-analysis of 24 clinical studies in 2008 showed that the long-term hair reduction rate of semiconductor lasers reached 57.5%, significantly higher than other types of laser equipment. In China, Chen Lin and other scholars confirmed that after ≥3 semiconductor laser treatments, the cure rate reached 71.8% and the total effective rate was 99.3%. There are differences in the efficacy of different parts of the body. The effective rate of hair removal for armpit hair, chest hair and back hair can reach 100%, while the effect of lip hair and hairline is slightly lower. These studies have promoted the refined regulation of diode laser hair removal machine parameters. Clinicians have found that yellow people (IV and V skin types)   need to extend pulse width and reduce energy during treatment to avoid pigmentation. The hair growth cycle also directly affects the efficacy, so a 2-month treatment interval is recommended for the trunk.   05 Global Impact and China Market Prospects According to Zhejiang Clinical Medical Research Data, Chinese companies have made great progress in the production of semiconductor hair removal equipment, but the high-end market is still dominated by imported equipment. At present, there is a technical gap in domestic products in terms of treatment spot size, cooling system efficiency and pain control. The 2020 industry report shows that the treatment satisfaction of semiconductor laser hair removal equipment equipped with advanced cooling systems reached 92%, and the repurchase rate was 45% higher than that of traditional technology. With the popularization of the concept of "comfortable hair removal", diode laser equipment combined with vacuum and freezing point technology is becoming a standard configuration for beauty institutions. Modern diode laser hair removal machine has achieved intelligent development. The latest model is equipped with a real-time skin sensing system and adaptive energy adjustment technology, which can automatically optimize treatment parameters according to skin color and hair density. Some high-end devices integrate multiple wavelength output systems. One machine can provide 810nm semiconductor laser and 1064nm Nd:YAG laser at the same time to meet the needs of different skin types. With the popularization of semiconductor laser technology, the global hair removal equipment market is expected to reach US$1.53 billion in 20257. The new generation of diode laser hair removal machines is developing in the direction of intelligence and multi-function. Some devices have integrated skin detection systems, which can automatically identify skin color and hair density and adjust parameters. Semiconductor laser hair removal technology has completely changed the field of cosmetic medicine. It not only meets people's demand for efficient and safe hair removal, but also promotes the technological upgrading of related industrial chains. From laboratory innovation to the gold standard of beauty, the development history of diode laser hair removal machines is a history of the integration of human pursuit of perfection and technological breakthroughs.  

From the unbearable burning "follicle burning" to painless freezing point care, how a technology originated from a Harvard laboratory reshaped the global beauty industry.                                    In 1998, semiconductor lasers (diode lasers) were first developed and applied to hair removal. This innovation eventually established the "gold standard wavelength" for hair removal treatment - 810nm. The choice of this wavelength is not accidental: it is at the optimal balance point between melanin absorption efficiency and skin penetration depth, and can effectively destroy hair follicles without damaging surrounding tissues.   01 Early Challenges and Technological Breakthroughs Before the advent of diode laser hair removal devices, the hair removal field was dominated by ruby lasers (694nm) and alexandrite lasers (755nm). These first-generation devices used the high-energy "burning" concept to heat the hair follicles to 60-70 degrees Celsius, and the treatment process often caused severe pain, blisters and even burns to patients. Between 1995 and 1996, ruby lasers, alexandrite lasers, and neodymium-doped yttrium aluminum garnet lasers (1064nm) entered the market one after another, but the results were mixed. Researchers at Harvard University's Wellman Medical Optics Laboratory found that hair follicle melanin has a significant absorption advantage in the 800-810nm wavelength range, while the surrounding tissue has a lower absorption in this band. This discovery provides a scientific basis for the development of a new diode laser hair removal machine.   02 Establishment of the gold standard In 1997, Wellman Laboratory launched the first clinical study of a medical semiconductor laser hair removal device, marking the official entry of diode laser technology into the practical stage7. The following year, Lumenis, the world's largest medical laser company, launched a groundbreaking product - the LightSheer semiconductor laser hair removal system. This diode laser hair removal machine has three revolutionary innovations: Using 800nm wavelength square spot (9×9mm or 12×12mm) Equipped with contact gem cooling device Providing three pulse widths: 30ms, 100ms and automatic setting  The device significantly reduces the risk of epidermal damage and became the safest and most efficient hair removal solution at the time7. Dermatologist Wang Yifeng pointed out in his research: "The semiconductor laser hair removal system, due to its unique wavelength and cooling technology, has achieved the unity of permanent hair removal and safety assurance for the first time".   03 Continuous innovation and comfort revolution After 2000, the diode laser hair removal machine entered a period of technological explosion. The emergence of "freezing point hair removal" technology (SHR) represents a leap forward in the third generation of semiconductor laser hair removal.http://www.diodelaser-machines.com This innovation uses an 810nm wavelength and a special dual pulse design: the preheating pulse raises the temperature of the hair follicles to 40°C, and then the heating pulse rises to 45°C. Through the continuous action of 10 pulses/second, the hair follicles gradually lose their activity in a painless process. Another breakthrough during the same period was vacuum hair removal technology. This technology combines a vacuum negative pressure system with a semiconductor laser. After the skin is stretched and thinned, the distance between the light source and the hair follicles is shortened, the density of epidermal melanin is reduced, and energy absorption is maximized. The spot area of the treatment head is expanded to 22×35mm, and the treatment time is shortened by 50%-70%.   04 Scientific verification and effect optimization A meta-analysis of 24 clinical studies in 2008 showed that the long-term hair reduction rate of semiconductor lasers reached 57.5%, significantly higher than other types of laser equipment. In China, Chen Lin and other scholars confirmed that after ≥3 semiconductor laser treatments, the cure rate reached 71.8% and the total effective rate was 99.3%. There are differences in the efficacy of different parts of the body. The effective rate of hair removal for armpit hair, chest hair and back hair can reach 100%, while the effect of lip hair and hairline is slightly lower. These studies have promoted the refined regulation of diode laser hair removal machine parameters. Clinicians have found that yellow people (IV and V skin types)   need to extend pulse width and reduce energy during treatment to avoid pigmentation. The hair growth cycle also directly affects the efficacy, so a 2-month treatment interval is recommended for the trunk.   05 Global Impact and China Market Prospects According to Zhejiang Clinical Medical Research Data, Chinese companies have made great progress in the production of semiconductor hair removal equipment, but the high-end market is still dominated by imported equipment. At present, there is a technical gap in domestic products in terms of treatment spot size, cooling system efficiency and pain control. The 2020 industry report shows that the treatment satisfaction of semiconductor laser hair removal equipment equipped with advanced cooling systems reached 92%, and the repurchase rate was 45% higher than that of traditional technology. With the popularization of the concept of "comfortable hair removal", diode laser equipment combined with vacuum and freezing point technology is becoming a standard configuration for beauty institutions. Modern diode laser hair removal machine has achieved intelligent development. The latest model is equipped with a real-time skin sensing system and adaptive energy adjustment technology, which can automatically optimize treatment parameters according to skin color and hair density. Some high-end devices integrate multiple wavelength output systems. One machine can provide 810nm semiconductor laser and 1064nm Nd:YAG laser at the same time to meet the needs of different skin types. With the popularization of semiconductor laser technology, the global hair removal equipment market is expected to reach US$1.53 billion in 20257. The new generation of diode laser hair removal machines is developing in the direction of intelligence and multi-function. Some devices have integrated skin detection systems, which can automatically identify skin color and hair density and adjust parameters. Semiconductor laser hair removal technology has completely changed the field of cosmetic medicine. It not only meets people's demand for efficient and safe hair removal, but also promotes the technological upgrading of related industrial chains. From laboratory innovation to the gold standard of beauty, the development history of diode laser hair removal machines is a history of the integration of human pursuit of perfection and technological breakthroughs.  

    London, July 12, 2025 – Salons around the world are quietly undergoing a transformation, thanks to the rapid adoption of diode laser hair removal technology. With the global portable diode laser market forecast to soar from $294 million in 2024 to $904.76 million in 2033, at a compound annual growth rate of 13.3%, this innovation is reshaping customer experience and business models. The technology behind the rise. Diode lasers – operating at wavelengths of 755nm, 810nm and 1064nm https://mao.ecer.com/index.php?r=news/add– offer unprecedented precision for different skin tones and hair densities. Recent advances include: - 65% of new devices feature a three-wavelength system, increasing treatment versatility. - 37% of devices integrate artificial intelligence for personalization, improving efficacy by up to 22%. - Sapphire-cooled tips improve comfort and increase customer satisfaction by 19%. Today, salons are capitalizing on these features by promising “lunchtime treatments” – quick, painless treatments with little downtime, catering to time-strapped professionals who are looking for efficiency.    Market Impact and Consumer Shift Aesthetic clinics dominate the diode laser application market, accounting for 45% of the global market in 2023. Their appeal lies in combining medical-grade results with spa-like comfort: - Customer bookings for diode laser services grew 24% between 2022 and 2023. - 60% of laser hair removal revenues come from beauty spas, driven by demand for non-invasive treatments. - Male clients are now a fast-growing group, especially for chest and back treatments, expanding the customer base for beauty salons. Meanwhile, the rise of home beauty devices (3.2 million units sold globally in 2023) is forcing salons to emphasize better results and expertise. “Consumers buy at-home devices for convenience, but they keep coming back to us for lasting results,” says Claudia Rossi, owner of Luminance Aesthetics salon in Milan.  Regional hotspots and growth frontiers  North America : Leading with 40% market share, thanks to high disposable incomes and 2.8 million in-clinic diode treatments per year.  Europe : Germany and France drive 21% growth in salon treatments, with strict CE certification reinforcing consumer trust.  Asia Pacific : Fastest growing region (28% sales growth), with China alone set to add more than 5,000 aesthetic clinics by 2023. Challenges and the road ahead  Despite the positive outlook, salons face a number of hurdles:  High costs : High-end devices cost more than $15,000, prohibitive for smaller businesses.  Regulatory scrutiny : Safety inspections increased 26% in 2023, delaying new product launches.  Competition : IPL and RF devices are cheaper but less effective. Innovations such as multifunctional diode systems (46% of new models can treat skin firming and acne) show that salons are becoming one-stop beauty centers.       “Diode lasers are not just tools, but strategic assets,” says Dr. Elena Torres, a dermatologist in Barcelona. As salons incorporate artificial intelligence and eco-friendly design, the technology is expected to deepen connections with customers and smoother skin in the coming decades.

Pre-Treatment Setup: Prepare the Room: Ensure the treatment room is clean, well-lit, and organized. Restrict access during operation. Post appropriate warning signs on the door. Prepare the Machine: Power on the main unit and the cooling system Allow the machine to initialize and perform any self-checks Connect the appropriate handpiece for the treatment area (spot size). Ensure the tip is clean and undamaged. Set the chilled air/cooling system to the desired level for client comfort and skin protection. Prepare the Client: Confirm signed consent forms Cleanse the treatment area thoroughly to remove makeup, lotions, oils, or deodorant. Shave the area meticulously 12-24 hours prior (hair should be visible just below the skin surface, not above). NEVER wax, pluck, or thread before treatment. Provide client protective eyewear and ensure a snug fit. Explain they must keep them on until told otherwise. Position the client comfortably, ensuring easy access to the treatment area. Protect clothing with drapes. Apply a thin layer of clear, ultrasound gel or specialized cooling gel to the treatment area. This enhances light transmission and skin contact. Set Treatment Parameters: Based on the client's skin type, hair color/coarseness, treatment area, and patch test results, set the machine parameters: Fluence (Joules/cm²): Energy density - Start LOW and gradually increase based on tolerance and efficacy. Repetition Rate (Hz): Pulses per second. Adjust for efficient coverage without overheating the skin. Spot Size (mm): Size of the laser beam. Larger spots penetrate deeper and cover faster but may be less comfortable on small areas. Select the appropriate handpiece. Skin Cooling: Set the contact cooling tip temperature and/or chilled air level.

Phase 1: Immediate Aftercare (First 24-48 Hours) Cool Down: Your skin will likely feel warm, sensitive, and look slightly red or swollen (like a mild sunburn). Apply cool compresses or ice packs (wrapped in a clean cloth) gently for short periods. Avoid direct ice-to-skin contact. Soothe: Use fragrance-free, alcohol-free aloe vera gel or a gentle, cooling moisturizer recommended by your clinic. Apply sparingly and gently. Leave it Alone: Avoid touching, rubbing, scratching, or picking the treated area. Friction can irritate the skin or cause infection. Skip the Heat: Say no to: Hot showers/baths (opt for lukewarm). Saunas, steam rooms, hot tubs. Strenuous exercise that causes excessive sweating. Heating pads or hot water bottles near the area. Loose Clothing: Wear soft, loose-fitting, breathable cotton clothing over treated areas to avoid friction and irritation. Gentle Cleansing: Wash the area very gently with cool/lukewarm water and a mild, fragrance-free cleanser. Pat dry do not rub. Phase 2: The First Week & Beyond (Critical Healing Window) Sun Protection is NON-NEGOTIABLE: This is the MOST IMPORTANT rule. Laser-treated skin is extremely photosensitive. Avoid Direct Sun Exposure: Completely shield treated areas from direct sunlight. High SPF Sunscreen: Apply a broad-spectrum mineral sunscreen (containing Zinc Oxide or Titanium Dioxide, SPF 30 or higher) generously every single time the area will be exposed to daylight, even through windows or on cloudy days. Reapply every 2 hours if outdoors. Cover Up: Wear protective clothing (wide-brimmed hats, long sleeves, pants) made of tightly woven fabrics. Consider UPF-rated clothing. No Tanning: Absolutely avoid sunbathing, tanning beds, and self-tanners on treated areas for at least 4-6 weeks before and after each session. Tanned skin increases the risk of burns and hyperpigmentation.