Matt Brown - The Laser Guy

Understanding IPL Filters Why “that little piece of glass” matters more than most people realise If you’ve spent any time around IPL, you’ve probably heard someone say something like:“Just chuck the 640 filter in and you’re only treating 640nm.” It sounds tidy. It’s also not how IPL filters work, and that misunderstanding is one of the easiest ways to end up with inconsistent results, unnecessary inflammation, or straight-up avoidable burns. Let’s clear it up properly. The two biggest myths about IPL filters Myth 1: “The filter only lets through the wavelength written on it” When people see a filter marked 520, 590, 640, they often assume that number is the only  wavelength coming out. In reality, with the common cut-off filters used in IPL, that number is usually telling you the lowest wavelength allowed through, not the only wavelength. So a “590” cut-off filter typically means:it blocks wavelengths below ~590nm and allows a broad band above it to pass (up to whatever the system’s la...

The aesthetic laser market is flooded with hype, misleading specs, and straight-up lies designed to separate inexperienced buyers from their money. Here are the fifteen most common claims that simply do not hold up under real clinical scrutiny. “Our triple-wavelength diode (755 + 808 + 1064 nm) is better than any single-wavelength system” Combining three compromised diodes into one handpiece almost always delivers weaker performance on every skin/hair combination than dedicated single-wavelength medical-grade platforms. “All Q-switched Nd:YAG lasers are basically the same” Beam profile, true nanosecond stability, energy homogeneity, and power density vary massively. A $15k unit and a proper medical platform both say “Q-switched Nd:YAG” on the box, but one clears tattoos and pigment safely in 6–10 sessions, the other drags it out to 15–20+ with more side effects. “Our laser permanently removes white, grey, blonde, or red hair” Zero melanin = zero selective target. No current laser or...

Lasers and light-based devices (long-pulsed lasers, Q-switched/picosecond lasers, and intense pulsed light/IPL systems) are the foundation of modern aesthetic treatments – hair removal, tattoo removal, vascular lesions, pigmented lesions, and skin rejuvenation all depend on delivering targeted light energy safely and effectively. Cooling performance remains the single most important variable (after wavelength and pulse characteristics) that determines how high we can safely push fluence while protecting the epidermis. Most “Built-In Air Cooling” Is Ineffective The majority of Q-switched, picosecond, and many lower-cost long-pulsed systems advertise “built-in air cooling”. In reality this is almost always just a fan blowing room-temperature or warmer air (25–40 °C) at high speed. It feels cool due to evaporation but provides negligible or zero genuine heat extraction. True cryogenic air cooling requires a separate refrigeration unit delivering –10 °C to –35 °C through a dedicated hose. ...

Laser and light-based devices, such as IPL (Intense Pulsed Light), HIFU (High-Intensity Focused Ultrasound), Q-Switch lasers, Nd:YAG, and DPL (Dynamic Pulse Light), are sophisticated tools used in aesthetic and medical treatments. To maintain their performance, safety, and longevity, regular servicing is essential. Many operators may not realise the full scope of what servicing entails, assuming basic cleaning is sufficient. This guide explains the key components of proper servicing, including energy calibration, safety testing, internal cleaning, pipe checks, water changes, and filter maintenance, to help you understand why it matters. The Importance of Regular Servicing Like any precision equipment, laser devices require routine maintenance to operate effectively. Servicing every 6-12 months, depending on usage, ensures consistent treatment results, prevents breakdowns, and enhances safety for both operators and clients. Neglecting maintenance can lead to reduced performance, costly ...

Welcome back to the Zenith Laser blog! If you're exploring laser hair removal options, you've likely come across terms like IPL, DPL, Diode, and Nd:YAG. These technologies use specific light wavelengths to target hair follicles, but their effectiveness and safety vary based on skin tone. In this post, we'll break down the key wavelengths for each device, explain how they work, and discuss their suitability for different skin types using the Fitzpatrick scale. We'll also address the risks of multi-wavelength machines. Whether you're fair-skinned or have deeper tones, understanding these differences can help you choose the right technology for smooth, long-lasting results. The Fitzpatrick Scale: A Guide to Skin Tones Before diving into the technologies, let's talk about the Fitzpatrick scale—a classification system developed by dermatologist Thomas Fitzpatrick in 1975. It categorizes skin into six types (I-VI) based on melanin content, how the skin reacts to sun e...

A Technician’s Perspective I’ve lost count of the times I’ve opened a laser and found the insides corroded, slimy, and smelling like an old fish tank. Algae on the pipes. Fungal growth in the tank. Brown water where clean, clear water should be. The truth is, the warm water in a laser’s cooling system is the perfect breeding ground for bacteria, fungi, and corrosion. The damage this causes is often more expensive to repair than buying a whole new laser  — thanks to the excessive prices many suppliers and manufacturers charge for parts. I’ve seen quotes of $10,000 for a handle  and $15,000 for a YAG rod . It’s madness, especially when most of this could have been avoided with regular servicing, proper water changes, and annual calibration. And yet, I still get calls from people who were sold a laser and told, “You don’t need servicing”  or “Just replace the handle and you’ll be fine.”  That’s not just bad advice — it’s dangerous. Those shortcuts ruin machines, put clients at risk, and l...

In the beauty and aesthetics industry, multi-wavelength diode lasers  — typically advertised as triple  or quad wavelength  systems — are being marketed as the “ultimate solution” for hair removal. The pitch sounds convincing: combine multiple wavelengths in one handpiece, and you can target all skin types and hair colours in a single pass. Unfortunately, the reality is very different — and in many cases, these machines can actually deliver worse  results, not better. How Multi-Wavelength Diodes Work (and Why It’s a Problem) A diode laser stack produces its energy using a series of diode bars. In a pure single-wavelength system  (such as a traditional 808 nm diode), 100% of the stack’s power output is dedicated to that wavelength, delivering consistent, high-energy treatment to the hair follicle. In a triple wavelength  diode stack, you’re splitting the stack into three sets of diode bars — for example: 755 nm  (often marketed for finer, lighter hair) 808 nm  (the gold standard for mos...