I've been running engraving orders since 2017. In that time, I've made some expensive mistakes that I'll gladly admit to: the wrong material selection, a bad settings guess, and one unforgettable order where I approved the sample but ignored the warning about the bulk material. That mistake cost roughly $1,100 in wasted blanks and rework. Since then, I've built a checklist for anyone working in my shop. The first question is always the same: 'What materials are actually going to be on your worktable each week?'
This question is why there's no perfect answer to the xTool F1 Ultra vs. a 40W CO2 comparison. They're both useful machines. They're also not the same tool. Let me walk you through real scenarios, including the xTool F1 Ultra laser specs I checked and the 40W CO2 laser cutter price data I found in January 2025.
Before I jump into scenarios, here are the specs I'm working from. According to xTool's product page (accessed January 2025), the F1 Ultra is a dual-laser system with a 20W fiber laser and a 20W diode laser. The xTool F1 Ultra laser wavelength for the fiber side is 1064 nm. The diode side is listed at around 455 nm, but I wouldn't quote me on that exact number because spec pages get updated. The important thing is that the fiber wavelength is what opens up permanent marking on bare metal.
Start With Your Material Mix, Not the Hype
If someone tells you to just buy the F1 Ultra because it's new, or just buy a 40W CO2 because it's the industry standard, they're ignoring your product mix. A few years ago, I went back and forth between a dual-laser machine and a CO2 unit for almost two weeks. The numbers said the CO2 gave me more power per dollar. My gut said metal jobs would keep showing up. Turns out my gut was right—the fiber side of the F1 Ultra paid for itself in about six months, but only because my workload was full of metal pet tags and engraved tumblers.
Scenario A: Metal-Heavy Work and Small Personalization
If your orders include stainless steel pet tags, keychains, jewelry, or aluminum nameplates, you need a fiber laser. That's not a preference; it's wavelength physics. The xTool F1 Ultra laser wavelength that matters here is the 1064 nm fiber source. A diode laser, even a strong one, will usually leave a faint mark that fades or just doesn't hold up. I learned this in 2019 when I accepted a 150-piece metal keychain order because I thought my desktop diode laser could handle it. It couldn't. I shipped the job late after paying a fiber laser service to finish it, and the total loss was around $420. That was enough to make me stop pretending one laser could do everything.
But the F1 Ultra isn't a universal answer either. The work area is compact, and if you want to mark a large steel sign, you'll be tiling and refocusing. The rotary attachment helps with cylindrical objects like tumblers and pens, but it isn't magic. I should add that I'm talking about the machine's specs, not my own ability to make every material cooperate. You still need test cuts with your actual blanks.
Scenario B: Large Sheet Goods and Acrylic Production
Now for the other side. If your work is mostly 1/4-inch acrylic cake toppers, large wood signs, puzzles, or custom invitations, a 40W CO2 laser cutter is still the better production tool. The CO2 wavelength, 10.6 micrometers, is absorbed by wood and acrylic in a way that gives clean finished edges. The F1 Ultra can cut thin sheet materials, but you'll be trading speed, and speed is money when you're running 50 identical pieces.
Let's talk about the 40W CO2 laser cutter price too. I compared quotes from four equipment distributors in January 2025, and the range was roughly $1,900 to $4,200 for a proper desktop 40W CO2 machine. That did not include installation, ventilation, or additional air assist, which can add a few hundred dollars. Verify current pricing on the manufacturer's site before you budget. And be careful with cheap import listings that say 40W but don't specify the laser tube or support network. You'll end up paying in downtime.
Does that mean a 40W CO2 is better than the F1 Ultra? No. It means it's better for a particular group of materials. If someone wants to cut sheet metal, a 40W CO2 laser is the wrong machine. If someone wants to mass-produce acrylic wedding favors, the F1 Ultra is the wrong machine. The word 'best' only makes sense in the context of your situation.
Scenario C: What About an Etsy Laser Business?
I get a lot of messages from people who want to start an Etsy shop because they saw a viral video. I checked Etsy's trending bestseller pages in early January 2025, and the top selling laser cut items on Etsy were mostly small personalization projects: engraved wooden signs, custom pet keychains, ornaments, stainless steel jewelry, wedding favors, and cake toppers. Some of those favor sheet materials and CO2. Many of them, especially metal keychains and nameplates, are actually easier with a fiber laser.
Here's the trap I fell into when I first started with Etsy: I bought equipment before I understood the market. I thought simple shapes would sell as long as the laser was cool. They didn't, because the market rewards detail, finish, and branding. If I were starting a side business today, I'd pick two or three product variants, order cheap samples or find a local makerspace, and run test batches before buying a machine. The F1 Ultra gives you a wider range of materials in one box, but that only helps if you know which materials your customers are actually buying.
Can You Laser Engrave Silicone?
The short answer is yes, but not the way the videos make it look. I tried to laser engrave silicone wristbands for a 2022 conference order, and my first attempts were bad. The fiber laser left a mark, but it was so faint that I thought the machine was broken. It wasn't. The silicone needed lower power, higher speed, and multiple passes. Then I had to clean the smoke residue off the band, which looked terrible unless I masked the area first.
Can you laser engrave silicone on the F1 Ultra? Yes, with the right expectations. I'd use the 1064 nm fiber side and test every batch because silicone formulas change between suppliers and even between different colors from the same supplier. On light silicone, the contrast is often poor. On dark or filled silicone, it's better. And the smell is something your office manager will complain about for days. Treat silicone like a specialty material, not a daily bread-and-butter job.
How to Decide Based on Your Situation
Here's the checklist I use before recommending any laser purchase:
- Write down your last 20 paid jobs, or your first 20 planned products. Count how many need metal marking. If it's more than five, fiber matters.
- Measure the largest item you plan to process. If it's bigger than the machine's work area, you'll spend extra time tiling or buying a bigger machine.
- Calculate batch cutting time for your core product. CO2 cuts acrylic and wood faster than the F1 Ultra, and that speed matters when you're filling a 40-piece order.
- Budget for extras. Air assist, rotary, ventilation, and sample materials add up. The sticker price is only the start.
- Test silicone and anything unusual in advance. I don't care how many marketing photos make it look simple.
There's also an option that more people should consider: start with a used 40W CO2 for sheet materials and rent time on a local fiber laser for metal jobs. It's not a flashy answer, but it's the one that makes sense when your budget is limited. The F1 Ultra is excellent for varied small-parts work, not for cutting large pallets of acrylic.
The Bottom Line
What was best practice in 2018 isn't necessarily best practice in 2025. The laser market has changed because machines like the F1 Ultra combine two wavelengths that used to require separate machines. But the fundamentals haven't changed: focus distance, air assist, material testing, and reliable supplier relationships still determine whether you make money. Don't let a single spec sheet make that decision for you.
Start with the product. Then the material. Then the machine. The right answer might be the F1 Ultra, a 40W CO2, or a hybrid setup that looks much less exciting in a YouTube thumbnail. Your bank account doesn't care about the thumbnail.
