Knowledge diode laser hair removal machine

diode laser hair removal machine

Access professional insights on diode laser hair removal machines. Read articles on treatment protocols, technology trends, and operational best practices.

Welcome to the knowledge hub for diode laser hair removal technology. Here, you will find comprehensive guides and industry analyses covering the mechanics of 808nm and multi-wavelength systems, alongside clinical case studies. Explore our articles to understand maintenance requirements, safety protocols, and the latest advancements in delivering effective hair reduction treatments for professional aesthetic clinics.

All Questions

Why Must Laser Equipment With Long Tdt Output Be Used For Large Hair Follicles? Optimize Your Hair Removal Efficacy

Learn why long pulse widths and Thermal Damage Time (TDT) are critical for destroying coarse hair follicles and preventing regrowth.

What Is The Physical Principle Behind Selecting 810Nm For Diode Laser Hair Removal? Master Selective Photothermolysis

Learn how the 810nm 'gold standard' wavelength uses selective photothermolysis to target melanin for permanent hair reduction in clinics and salons.

What Are The Technical Advantages Of Sliding-Mode Diode Laser Hair Removal? Fast, Painless, & High-Precision Results

Discover how sliding-mode diode lasers revolutionize hair removal through thermal accumulation, high repetition rates, and painless treatments.

How Does Vacuum-Assisted Technology Improve The Efficiency Of Laser Hair Removal? Maximize Precision And Safety

Learn how vacuum-assisted technology optimizes laser efficiency by thinning skin and displacing blood to focus energy on the hair follicle.

What Is The Physiological Mechanism For Reduced Pain In Sliding Diode Laser Hair Removal? Master Comfort With Belis

Learn how sliding-mode diode lasers use gradual thermal accumulation and selective photothermolysis to reduce pain in hair removal procedures.

How Does The Treatment Efficiency Of The Sliding-Mode Diode Laser Compare To Vacuum-Assisted Single-Pulse Technology?

Compare sliding-mode vs. vacuum-assisted diode lasers for large-area hair removal. Discover why vacuum tech is 50% faster for clinics.

How Does The Setting Of Pulse Duration Impact The Safety And Efficacy Of Diode Laser Hair Removal Treatments?

Master pulse duration in diode laser hair removal to balance Thermal Relaxation Time, ensuring follicle destruction while protecting diverse skin types.

Why Is The Low-Fluence Diode Laser Safer For Dark Skin? Expert Guide To Multi-Pass Hair Removal

Learn how the low-fluence, multi-pass diode laser technique prevents burns and hyperpigmentation in darker skin through cumulative heating.

What Is The Function Of The 808–810 Nm Diode Laser In Hair Removal? Optimize Results As Hair Characteristics Change

Learn how the 808–810 nm Diode laser acts as a transitional tool to target thinning hair and residual melanin for effective long-term hair removal.

What Are The Primary Benefits Of Using A Triple-Wavelength Rotating Laser Hair Removal Protocol? Boost Clinic Results

Learn why triple-wavelength laser protocols beat single-wavelength systems by adapting to hair growth stages for superior clinical results.

By What Mechanism Does Selective Photothermolysis In Laser Equipment Inhibit Hair Growth? A Deep Dive Into Hair Removal

Learn how selective photothermolysis uses melanin as a target to destroy hair follicles via thermal energy while protecting surrounding skin.

What Are The Advantages Of Using Conduction Gel Over Paste In Hair Removal? Enhance Safety And Treatment Comfort

Learn why conduction gel is superior for hair removal, offering uniform current distribution and reduced skin irritation through heat management.

What Is The Necessity Of A Professional 3-Step Cleansing Method Prior To Hair Removal? Optimize Energy For Better Results

Learn how a professional 3-step cleansing method removes skin barriers to enhance energy conduction and prevent post-treatment folliculitis.

Why Is The Destruction Of Hair Follicle Stem Cells Required For Permanent Hair Removal? The Science Of Smooth Skin

Learn why permanent hair removal requires targeting follicle stem cells and how professional technology ensures lasting results for clinics.

How Does A Large-Diameter Spot Size, Such As 18Mm, Contribute To The Clinical Efficiency Of Hair Removal Equipment?

Learn how an 18mm spot size boosts laser hair removal efficiency through deeper penetration, faster treatment times, and superior energy uniformity.

Why Is A High-Precision Camera System Essential For Laser Hair Removal? Ensure Clinical Success With Objective Data

Discover why high-precision imaging is the non-negotiable foundation for measuring laser hair removal efficacy and ensuring objective results.

How Does The Principle Of Selective Photothermolysis Achieve Permanent Hair Removal In Medical Aesthetic Equipment?

Learn how selective photothermolysis and thermal relaxation enable permanent hair removal while protecting surrounding skin in clinical lasers.

How Do Professional-Grade Laser Systems Achieve Selective Photothermolysis? Precision Hair Removal Explained

Learn how laser systems use selective photothermolysis to target melanin and destroy hair follicles safely while protecting surrounding skin.

Why Is Protective Eyewear With Specific Od Mandatory For Laser Hair Removal? Safeguard Your Vision Today

Learn why specific Optical Density (OD) eyewear is critical to prevent permanent retinal damage during professional laser hair removal.

What Is The Primary Function Of High-Efficiency Smoke Evacuators In Laser Hair Removal? Ensure A Safe Clinic Environment

Learn how high-efficiency smoke evacuators protect health by capturing ultrafine particles and maintaining air quality during laser treatments.

Why Must Class 4 Laser Hair Removal Equipment Be Operated Within Controlled Treatment Facilities? Key Safety Standards

Learn why Class 4 laser hair removal requires controlled environments to prevent severe injury and ensure compliance in medical aesthetic services.

What Are The Risks Of Using Laser Hair Removal Equipment On Skin Areas With Tattoos? Essential Safety Protocols

Learn why laser hair removal on tattooed skin causes burns and how to mitigate risks through shielding and strict avoidance zones.

How Does Laser Wavelength Selection Impact Hair Removal For Different Skin Types? Mastering Safety And Efficacy

Learn how Alexandrite, Diode, and Nd:YAG wavelengths interact with Fitzpatrick skin types to ensure safe and effective laser hair removal.

What Are The Key Technical Contributions Of Medical Cooling Gel? Boost Efficiency & Safety In Photoelectric Hair Removal

Discover how medical cooling gel acts as an optical coupler and thermal buffer to maximize light penetration and prevent epidermal burns.

How Is Pulse Width Adjusted In Facial Hair Removal? Optimize Safety & Efficacy For Your Clinic

Master Thermal Relaxation Time (TRT) and pulse width settings to balance facial hair removal results with patient safety.

What Is The Function Of Antibiotic Ointments In Laser Hair Removal Care? Protect Your Skin For Perfect Results

Learn why antibiotic ointments are crucial post-laser hair removal to prevent infection, maintain moisture, and accelerate skin tissue recovery.

Why Are Standardized Grid Tools Used In Laser Hair Removal? Ensure Clinical Precision And Objective Efficacy Results

Learn how 4.5 cm x 4.5 cm grid tools eliminate bias and provide precise, repeatable data for measuring laser hair removal treatment success.

What Are The Technical Advantages Of Using An 810Nm Diode Laser In Robotic Hair Removal? Precision Meets Automation

Discover why the 810nm diode laser is the gold standard for robotic hair removal, offering deep penetration and stable energy for maximum efficacy.

What Is The Role Of Laser Epilation Equipment In Pepsit Preparation? Prevent Recurrence With Advanced Follicle Control

Learn how Laser Epilation equipment optimizes PEPSiT results by eliminating the pathological cause of pilonidal sinus and reducing recurrence rates.

Why Is An Advanced Cooling System Integrated Into Laser Handpieces Essential? Ensuring Safe Pilonidal Sinus Treatment

Learn why integrated cooling is critical for pilonidal sinus laser therapy to prevent burns, hyperpigmentation, and eliminate patient pain.

What Is The Significance Of Continued Laser Epilation After Pilonidal Sinus Surgery? Stop Recurrence Effectively

Learn why laser epilation is a medical necessity after pilonidal sinus surgery to destroy hair follicles and prevent recurring infections.

How Does A Professional-Grade 755 Nm Alexandrite Laser System Facilitate Permanent Hair Reduction In Axillary Treatments?

Learn how the 755nm Alexandrite laser uses selective photothermolysis for permanent hair reduction and its secondary benefits for underarm care.

What Is The Primary Function Of An Integrated Cryogen Spray System? Key To Safe High-Fluence Laser Hair Removal

Learn how integrated cryogen spray systems protect the epidermis and enable high-fluence laser hair removal for better clinical results.

What Are The Advantages Of Large Spot Sizes And Adjustable Fluence? Optimize Your Axillary Hair Removal Results

Discover how large spot sizes and adjustable fluence improve penetration and precision in axillary laser hair removal for professional clinics.

Through What Biological And Physical Mechanisms Does Axillary Laser Treatment Improve Bromhidrosis? Expert Analysis

Learn how laser treatment solves bromhidrosis by thermally destroying apocrine glands and altering the axillary microbiome for odor-free skin.

How Does Adjustable Pulse Duration In Laser Hair Removal Ensure Safety? Protect Sensitive Axillary Skin Effectively

Learn how adjustable pulse duration prevents burns and hyperpigmentation in sensitive areas like the axilla via selective heating technology.

What Is The Significance Of Dcd In Laser Hair Removal? Enhance Skin Safety & Treatment Efficacy With Dynamic Cooling

Learn how Dynamic Cooling Devices (DCD) protect the epidermis, improve comfort, and allow for higher energy laser treatments during hair removal.

What Are The Advantages Of Built-In Cryogen Spray Technology For Darker Skin? Safer Laser Hair Removal Solutions

Learn how cryogen spray technology protects melanin-rich skin during laser treatments, allowing for higher efficacy and safety for dark skin tones.

What Technical Advantages Does A Thickened Sapphire Window Provide? Enhance Cooling For Diode Laser Hair Removal

Discover how thickened sapphire windows optimize thermal management, protect dark skin tones, and enable higher fluence in laser treatments.

How Does The Fitzpatrick Skin Classification Scale Guide Laser Hair Removal? Master Safe & Effective Parameter Settings

Learn how the Fitzpatrick Scale optimizes laser hair removal by guiding wavelength, energy density, and pulse duration for every skin type.

How Is The Visual Pain Scale (Vps) Used To Evaluate Laser Hair Removal Equipment? Optimize Comfort & Efficacy

Learn how the Visual Pain Scale (VPS) measures cooling efficiency and pulse management to identify high-performance, painless laser systems.

Why Must Hair Be Shaved To The Skin Surface Level Before Performing Laser Hair Removal On Dark Skin? Safety First Guide

Learn why shaving is essential for safe laser hair removal on dark skin to prevent burns and maximize energy delivery to the hair follicle.

What Physical Protection Does An Integrated Cooling Tip Provide? Ensure Safe And Effective Laser Hair Removal

Learn how integrated cooling tips prevent burns and skin damage during laser hair removal by providing continuous thermal regulation and protection.

What Is The Role Of External Air Cooling Systems In Laser Hair Removal? Enhance Safety And Efficacy With Air Cooling

Learn how external air cooling manages thermal accumulation in laser hair removal to enable higher energy treatments and improve patient comfort.

How Do Ice Packs And Cold Gels Assist In Laser Hair Removal? Master Thermal Management For Optimal Safety

Learn how ice packs and cold gels act as thermal regulators and optical enhancers to prevent burns and improve laser hair removal efficiency.

Why Is It Necessary To Thoroughly Remove Makeup Before Facial Laser Hair Removal? Ensure Safety And Prevent Burns

Learn why cleaning your skin before facial laser hair removal is vital to prevent thermal burns and permanent pigment discoloration.

What Are The Clinical Benefits Of Utilizing A Large Spot Size And Synchronous Cooling In Diode Laser Hair Removal Systems?

Learn how large spot sizes and synchronous cooling optimize diode laser hair removal by increasing penetration and ensuring patient safety.

What Are The Technical Advantages Of Professional Laser Hair Reduction? Upgrade Your Clinic With Laser Technology

Discover why professional laser systems outperform manual tools through selective photothermolysis, reducing skin trauma and inhibiting hair growth.

How Does The Use Of A Large Spot Size Impact Laser Treatments For Hirsutism? Boost Depth & Efficacy

Learn how a 10mm spot size enhances laser penetration depth, improves treatment speed, and effectively targets deep-seated hair for hirsutism.

Why Are Multiple Consecutive Sessions Required To Achieve Optimal Results In Laser Treatments For Hirsutism?

Learn why hair growth cycles make multiple laser sessions essential for treating hirsutism and how to achieve permanent reduction results.

What Role Does An Industrial-Grade Laser Hair Removal System Play In Hs? Advanced Clinical Prevention For Clinics

Discover how industrial-grade lasers treat Hidradenitis Suppurativa by disrupting follicular occlusion and inducing remission in mild to moderate cases.

What Is The Core Mechanism Of Selective Photothermolysis? Mastering Precision In Laser Hair Removal And Skin Treatments

Learn how Selective Photothermolysis uses specific wavelengths and thermal relaxation to target chromophores while protecting surrounding tissue.

Why Is A Laser Hair Removal Protocol Recommended After Pilonidal Sinus Surgery? Prevent Recurrence Effectively

Learn how laser hair removal prevents pilonidal sinus recurrence by eliminating biological foreign bodies and protecting healing surgical sites.

How Do Advanced Cooling Systems Reduce Side Effects For Dark Skin? Ensure Safety In Laser Hair Removal

Learn how high-flow cooling technologies at -30°C protect melanin-rich skin from burns and hyperpigmentation during laser hair removal.

What Role Do Dual-Wavelength Laser Systems Play In Pilonidal Sinus Disease? Prevent Recurrence With 755Nm & 1064Nm

Learn how 755nm/1064nm laser systems prevent Pilonidal sinus recurrence by eliminating hair follicles and reducing inflammation across skin types.

Why Specific Laser Parameters Are Used For Pilonidal Sinus? Optimize 20–40Ms And 18–25 J/Cm² For Treatment Success

Learn why 20–40ms pulse widths and 18–25 J/cm² energy density are vital for treating Pilonidal sinus disease safely and effectively.

How Do Advanced Laser Systems With Dual-Wavelength Technology Accommodate Different Fitzpatrick Skin Types? (Full Guide)

Learn how dual-wavelength lasers like Nd:YAG and Alexandrite safely treat Pilonidal sinus disease across all Fitzpatrick skin types.

Why Is A Series Of Three Or More Sessions With A Laser Hair Removal System Necessary? Prevent Pilonidal Sinus Recurrence

Learn why 3+ laser hair removal sessions are essential to target hair growth cycles and reduce Pilonidal sinus recurrence rates to as low as 7%.

What Is The Clinical Value Of Combining Laser Hair Removal Systems With Epsit? Achieve 94% Post-Operative Healing

Discover how combining laser hair removal with EPSiT prevents pilonidal sinus recurrence and boosts clinical healing rates to 94%.

What Are The Technical Advantages Of Using A 12–15Mm Spot Size In Laser Systems? Maximize Depth For Pilonidal Sinus Care

Learn how a 12–15mm spot size reduces light scattering and improves deep tissue penetration for effective Pilonidal sinus disease laser treatments.

How Does Laser Hair Removal Equipment Contribute To The Management Of Hs? Transforming Clinical Outcomes

Learn how professional laser systems like Nd:YAG and Diode break the inflammatory cycle of Hidradenitis Suppurativa by targeting follicular occlusion.

What Are The Advantages Of Sapphire Contact Cooling? Enhance Laser Hair Removal Efficacy And Patient Comfort

Discover why sapphire contact cooling is superior to air cooling for laser hair removal, offering better safety and higher energy efficiency.

How Does The Spot Size Of A Semiconductor Laser Hair Removal Device Influence Treatment Depth? Optimize Deep Results

Learn why spot size is the key to deep follicle penetration. Discover how large spot sizes minimize scattering for effective hair removal.

Why Is An Integrated Peltier Technology Metal Cooling Rod Used For Active Skin Cooling? Ensure Safe Laser Treatments

Learn how Peltier cooling rods protect the epidermis and enable high-energy laser efficacy through active contact cooling technology.

What Is The Core Function Of Transparent Ultrasound Gel In Laser Hair Removal? Ensure Safety And Maximize Energy.

Learn how ultrasound gel acts as an optical coupling agent to eliminate energy loss and protect skin during laser hair removal.

What Are The Technical Advantages Of The Double-Pulse Mode? Master Safe And Effective Laser Hair Removal

Learn how double-pulse mode uses Thermal Relaxation Time to maximize hair follicle destruction while ensuring superior epidermal safety and comfort.

Why Must The Energy Density Or Fluence Be Adjusted When Increasing The Laser Spot Size? Essential Laser Safety Tips

Learn why increasing laser spot size reduces light scattering and why you must lower fluence to prevent skin burns during hair removal.

Why Is A Wide Range Of Adjustable Pulse Widths Necessary For Laser Hair Removal? Ensure Safe & Effective Treatments

Learn how adjustable pulse widths (15-400 ms) optimize laser hair removal for all skin tones and hair textures while preventing skin burns.

What Protection Does An Integrated Sapphire Cooling Handle Provide? Enhance Safety In High-Energy Laser Hair Removal

Learn how sapphire cooling handles provide critical thermal protection, preventing burns and enhancing safety during laser hair removal treatments.

Why Must The Fitzpatrick Scale Assessment Be Conducted Before Beginning A Laser Hair Removal Treatment? Essential Safety

Learn why the Fitzpatrick Scale is critical for safe laser hair removal, optimizing settings to prevent burns and maximize treatment efficacy.

What Is The Clinical Necessity Of Performing A Patch Test During The Laser Hair Removal Process? Ensuring Patient Safety

Learn why patch testing is critical for laser hair removal, from calibrating energy density to preventing adverse events and ensuring skin safety.

How Does A High Peak Power Of 2100 W Contribute To The Effectiveness Of Laser Hair Removal Equipment? Power Your Clinic

Learn how 2100W peak power improves laser hair removal efficacy by targeting fine hair and ensuring patient safety with high energy density.

Why Is 20X Digital Microscopy Utilized To Objectively Evaluate The Effectiveness Of Laser Hair Removal? Precise Data

Discover how 20x digital microscopy transforms laser hair removal evaluation through precise quantification and objective hair density analysis.

What Factors Determine The Selection Of Laser Wavelengths? Expert Guide To 755Nm, 808Nm, And 1064Nm Hair Removal

Learn how skin type and follicle depth influence laser wavelength selection (755nm-1064nm) for safe and effective hair removal treatments.

Why Are Sapphire Windows Utilized As The Coupling Medium In Contact Cooling? 3 Key Benefits For Laser Hair Removal

Learn why sapphire windows are the gold standard in laser hair removal for protecting the skin, enhancing comfort, and improving energy delivery.

Why Is A Precooling Step Necessary For Short-Pulse Laser Hair Removal? Ensure Epidermal Safety In Fast Treatments

Learn why precooling is vital for short-pulse laser treatments to prevent skin injury and manage rapid thermal buildup effectively.

What Is The Technical Value Of Postcooling Processes? Enhance Laser Hair Removal Safety And Patient Comfort

Learn how postcooling processes quench residual heat, normalize skin temperature, and reduce post-operative complications in laser hair removal.

What Is The Heat Dissipation Function Of High-Transparency Aqueous Gel? Enhancing Safety In Laser Hair Removal

Learn how high-transparency aqueous gel acts as a passive heat sink to prevent burns and improve comfort during laser hair removal treatments.

What Role Does An Integrated Cold Air Skin Cooling System Play In Laser Hair Removal? Ensure Safety And Higher Efficacy

Discover how integrated cold air cooling protects the skin, enables higher laser energy, and improves patient comfort in hair removal procedures.

Why Is A 12.5Mm Spot Size Diameter Critical In Facial Hirsutism Laser Treatment? Maximize Depth & Results

Learn how a 12.5mm spot size optimizes laser penetration and reduces scattering for effective deep-follicle facial hair removal and clinical speed.

How Does A 20Ms Pulse Width Setting Influence Hair Follicle Destruction? Master Precise Thermal Regulation

Learn how a 20ms pulse width optimizes laser hair removal by matching thermal relaxation time for safe, permanent hair follicle destruction.

Why Must A Patch Test Be Included In Laser Hair Removal? Ensure Patient Safety & Clinical Precision

Discover why patch tests are mandatory for laser hair removal. Learn how to prevent burns, calibrate fluence, and ensure clinical safety.

Why Do Laser Systems Use 755Nm And 1064Nm For Hair Removal? Optimize Safety And Results For All Skin Types

Learn why 755nm Alexandrite and 1064nm Nd:YAG wavelengths are essential for safe, effective hair removal on Fitzpatrick skin types I–VI.

What Is The Primary Function Of Integrated Skin Cooling In Laser Hair Removal? Master Safety And Efficacy

Learn how integrated cooling systems protect the skin, prevent thermal injury, and enable higher energy fluence for better hair removal results.

What Are The Technical Benefits Of Using Refrigerated Air Cooling Systems In Conjunction With Alexandrite Laser Hair Removal Devices? Enhance Safety And Efficiency

Learn how refrigerated air cooling optimizes Alexandrite lasers through non-contact thermal protection, dynamic control, and improved treatment speed.

How Does Long Pulse Technology Achieve Selective Photothermolysis? Mastering Precision In Laser Hair Removal

Learn how long pulse technology uses Thermal Relaxation Time (TRT) to destroy hair follicles while protecting surrounding skin during laser treatments.

What Is The Clinical Importance Of Conducting Test Patches? Ensuring Safe And Effective Laser Hair Removal

Learn why a test patch is vital for laser hair removal, from calibrating energy settings to preventing skin injury and ensuring treatment efficacy.

How Does Professional Laser Hair Removal Compare To Electrolysis Or Waxing? The Ultimate Guide For Clinical Efficiency

Discover why laser hair removal outperforms electrolysis and waxing in clinics through photothermal speed and long-term durability.

What Are The Specific Functions Of A Dynamic Cooling Device (Dcd)? Protect Skin And Boost Laser Efficacy

Learn how DCD technology uses cryogen cooling to protect the epidermis, reduce pain, and enable higher energy laser treatments safely.

What Is The Function Of A High-Precision Solenoid Valve In A Laser Dcd? Maximize Safety And Laser Efficacy

Learn how high-precision solenoid valves provide millisecond-level cryogen control to protect the skin and enable higher laser energy settings.

What Are The Technical Advantages Of Utilizing A 12-Mm Spot Size In Laser Hair Removal? Maximize Depth And Efficiency

Learn how a 12-mm spot size improves laser hair removal by increasing penetration depth, reducing scattering, and accelerating treatment speed.

Why Is The Use Of A Laser Spacing Piece Required? Prevent Thermal Damage & Ensure Treatment Precision

Learn how laser spacing pieces prevent thermal stacking, reduce tissue injury risk, and ensure uniform treatment coverage for safer laser therapy.

What Is The Clinical Importance Of Adjusting Cryogen Spurt Duration For Fitzpatrick V? Ensure Safety For Dark Skin

Learn why increasing cryogen duration to 100ms is vital for Fitzpatrick V skin to prevent burns and PIH during laser treatments.

Why Are Professional Laser Systems Preferred For Pcos Hirsutism? Restore Confidence With Advanced Medical Lasers

Discover how Diode and Nd:YAG lasers target PCOS-related hirsutism through selective photothermolysis for long-term hair reduction and skin health.

Why Is The Selection Of Laser Wavelengths Critical For Pcos Hirsutism? Optimize 755Nm, 810Nm, & 1064Nm For Results

Understand why choosing 755nm, 810nm, or 1064nm laser wavelengths is vital for PCOS hirsutism treatment safety and efficacy across all skin types.

What Is The Primary Function Of Selecting Specific Wavelengths In Diode Laser Hair Removal? Master Clinical Precision

Learn how wavelength selection in diode lasers balances melanin absorption and penetration depth for safe, permanent hair reduction results.

How Does The 940Nm Wavelength Provide Protection For Dark Skin? Safe Laser Hair Removal For Fitzpatrick Iv-Vi

Learn how the 940nm wavelength ensures safe hair removal for dark skin types by bypassing epidermal melanin and reducing burn risks.

What Specific Technical Challenges Does The Long-Pulse 1060Nm Wavelength Address In Laser Hair Removal Equipment?

Learn how the long-pulse 1060nm wavelength solves epidermal burns and melanin competition for safe laser hair removal on dark and tanned skin.

How Does The In-Motion Technique Optimize Energy Distribution? Enhancing Safety And Uniformity In Laser Hair Removal

Learn how the In-motion technique optimizes laser energy distribution through gradual heat accumulation for painless, uniform clinical results.

What Is The Function Of The Integrated Cooling System In Laser Hair Removal? Ensure Safety At High Energy

Learn how integrated cooling systems protect the skin, reduce pain, and enable high-energy laser fluence for permanent hair removal results.