If you’ve been searching for information about perspex sheets for laser cutting, you’ve come to the right place. After 11 years of running our own laser cutting business and now supplying materials to hundreds of laser cutters across Ireland and the EU, we’ve learned a thing or two about what works and what doesn’t when it comes to acrylic.
Whether you’re running a commercial laser cutting business making products for customers or you’re a hobbyist with an xTool in your spare room, getting the right perspex sheets makes all the difference to your finished projects. The wrong material or thickness can mean wasted time, rough edges, and frustrated customers. Let me share what we’ve learned so you can get great results from the start.
Why 3mm Perspex Sheets Are Our Most Popular Thickness
We sell a lot of 3mm perspex, and there’s a good reason it’s become the go-to thickness for most laser cutting projects. It offers the perfect balance between having enough strength for finished products whilst still being relatively easy to cut with lower wattage machines.
Here’s a useful rule of thumb we share with customers: you typically need approximately 10 watts of CO2 laser power per millimetre of acrylic. That means 3mm perspex can generally be cut with a 30 watt laser. Since many of our customers are small businesses or hobbyists working with lower power machines, 3mm gives them the versatility they need without requiring an industrial-level laser cutter.
Thinner sheets like 1.5mm or 2mm work brilliantly for engraving-focused projects or decorative items that don’t need much structural integrity. On the other hand, thicker sheets require more powerful machines that many smaller operations simply don’t have. The 3mm sweet spot means you can create sturdy signs, gift products, decorative panels, and countless other items without needing to upgrade your equipment.
Cast Acrylic vs Extruded: Why We Only Sell Cast Perspex Sheets
You might notice when shopping for acrylic that there are two main types: cast and extruded. At Laser Materials, we made the decision early on to only stock cast acrylic perspex sheets, and we’ve never regretted it.
The simple reason? Cast acrylic gives a cleaner finish when laser cutting. If you’ve ever tried cutting extruded acrylic, you’ll know it can produce inconsistent edges and doesn’t respond as well to the laser. Cast acrylic, on the other hand, cuts beautifully with smooth, polished-looking edges that often don’t need any post-processing.
From our experience running lasers ourselves, we know that the quality of your material directly impacts the quality of your finished products. When you’re trying to build a reputation or create something you’re proud of, using cast acrylic rather than extruded makes a noticeable difference. It’s one of those things where spending a bit more upfront saves you time and frustration later.
Best Colours and Finishes for Laser Engraving Perspex
Not all perspex colours engrave equally well. If you’re planning to engrave rather than just cut through your material, colour choice becomes crucial for achieving good contrast and visibility.
Dark colours—especially black—give you the best contrast when engraving. When you engrave into black or other dark colour acrylic, the laser removes the surface layer to reveal a frosted white underneath, creating brilliant contrast that’s immediately visible and looks professional.
White perspex sheets, on the other hand, don’t show engraving nearly as well. The frosted effect from engraving white acrylic is subtle at best and often barely visible unless you’re looking at it in the right light. If a customer asks us what colour to use for an engraved sign or award, we always steer them towards darker colours for the best results.
This doesn’t mean white perspex doesn’t have its place—it’s fantastic for cutting decorative shapes, layering with other colours, or projects where you’re cutting all the way through rather than engraving. Just know its limitations when planning your project.
How to Get Clean Edges and Prevent Melting When Cutting
One of the most common questions we get is about preventing melting or rough edges when laser cutting perspex sheets. The good news is that with cast acrylic and the right settings, you should get pretty smooth edges naturally.
The key factors are having enough power and the correct speed on your laser. Too slow and you’ll overheat the material, causing excessive melting. Too fast without enough power and you won’t cut through cleanly, leaving rough or partially cut edges.
Air assist also plays a crucial role. The air flow helps blow away melted material and cools the cut as you go, resulting in those beautifully polished-looking edges that cast acrylic is known for. We always recommend that people do a test with their laser at different power settings and different air assist settings before committing to cutting a full sheet.
Every machine is different—a 40 watt laser from one manufacturer might cut differently than a 40 watt from another. That’s why we can’t give you one-size-fits-all settings, but we can tell you that taking 15 minutes to run tests on scrap pieces will save you from ruining expensive materials later.
The Standard Size: Why We Sell 600 x 400mm Perspex Sheets
All our perspex sheets come in 600 x 400mm size. We’ve chosen to focus on this single size for good reasons based on years of experience in the laser cutting industry.
The 600 x 400mm format is a very common size in the laser cutting world. It works brilliantly for hobby machines like xTool and other popular home laser cutters, but it’s equally practical for production level machines. Even in our other laser cutting business, a lot of what we cut comes from that sheet size.
This size gives you enough material to be efficient with your layouts whilst still being manageable to handle and store. It fits well on most laser beds, and you can get multiple smaller products from a single sheet or use it for larger items. For businesses, ordering in this standard size means you can maintain consistent inventory without having to stock multiple sizes.
We ship these sheets throughout Ireland and across the EU, with most orders going out same day via An Post from our warehouse here in Straffan, County Kildare. Whether you’re ordering one sheet for a hobby project or 100 sheets for production runs, we’re set up to get them to you quickly.
Finding Quality Laser Grade Perspex Sheets in Ireland
If you’re looking for laser grade perspex sheets in Ireland with reliable, fast delivery, that’s exactly what we do at Laser Materials. We’ve built our business around understanding what laser cutters actually need because we’ve been running lasers ourselves for over a decade.
We stock cast acrylic in 3mm thickness as standard, in our 600 x 400mm sheet size. Our warehouse in County Kildare means we can offer same day shipping on most orders to anywhere in Ireland and throughout the EU. You can browse our full range and order online at lasermaterials.ie.
Whether you’re a commercial operation producing gifts and products for customers or a hobbyist working on your latest project in the evenings, we’re here to help. We’re always happy to answer questions about materials, offer advice based on our experience, or help you figure out what will work best for your specific application. That’s the benefit of buying from people who actually use this stuff themselves rather than just selling it.
Ready to start your next laser cutting project? Browse our selection of cast acrylic perspex sheets at lasermaterials.ie, and get in touch if you have any questions. We ship throughout Ireland and the EU, with most orders leaving our warehouse the same day you order.
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