xTool F1 Ultra Laser Specs: An Owner's FAQ on Wavelength, Etsy Items, and Silicone

I run a small custom engraving shop. I take orders through Etsy and word-of-mouth, and I've been doing this for about four years. I've personally made—and documented—seven significant mistakes that cost me roughly $4,600 in wasted material and redo time. That's why I keep a checklist, and this FAQ is basically that checklist with the machine-specific stuff answered.

Before I get into the questions: my experience is based on a few hundred orders, mostly wood, acrylic, anodized aluminum, and stainless steel. If you're planning to engrave glass or food-contact stuff at scale, your experience may be different. This isn't a general 'here's everything' guide.

1. What are the xTool F1 Ultra laser specs?

The F1 Ultra is a desktop dual-laser engraver, which is the whole reason I bought it. It uses two separate laser sources:

• Fiber laser: 20W, wavelength 1064 nm — for metals like stainless steel, aluminum, and some plastics
• Diode laser: 20W, wavelength 455 nm — for wood, acrylic, leather, and other organic materials

The combined source setup lets me switch between, say, a metal keychain and a wooden cutting board without swapping machines. I don't remember the exact advertised work area off the top of my head, because xTool sells different honeycomb/slats and extension accessories. If that number matters, check the current xTool page. The important thing is that it's a desktop unit with optional rotary support for tumblers, bottles, rings, that kind of thing.

2. What is the xTool F1 Ultra laser wavelength, and why does it matter?

The fiber side runs at 1064 nm, which is infrared. That wavelength is absorbed well by metal, which is why a fiber laser can mark stainless steel without coating. The diode side runs at 455 nm, which is blue light; organic materials like wood and acrylic absorb it much better than they absorb infrared. In practice, that means you should use fiber for metal and blue diode for wood/acrylic, and not try to use one for the other.

If you try to engrave bare steel with a 20W blue diode, it won't work. I tried early on; it didn't. I've also tried to mark acrylic with the fiber source, and the results were ugly. I should add: some materials like titanium or brass can be marked with fiber, but the color and contrast depend on the alloy. There's no universal setting.

3. What's a 40W CO2 laser cutter price, and should I just buy that instead?

I went back and forth on this for two weeks. In early 2025, the desktop 40W CO2 machines I priced were in the $1,200 to $4,500 range, depending on brand, tube warranty, and enclosure. A Glowforge-style solution costs more; an OMTech/Monport-style bare-bones setup can be closer to the lower end. CO2 is excellent for cutting acrylic and wood, and the work area is usually much larger than the F1 Ultra's.

But for my order mix, the F1 Ultra made more sense. A 40W CO2 can't mark bare metal without specialized upgrades, and metal orders are maybe half my revenue. On paper, the CO2 was the logical choice for cutting; my gut said I'd be sending metal engraving out for the rest of the year. I chose the F1 Ultra, and I haven't regretted it. But if you're mostly cutting thick acrylic and wood, a 40W CO2 might be the better call. It all depends on what you actually sell.

I don't have hard data on current CO2 prices for every brand—they move around, so don't quote me on those numbers. Treat them as a starting range.

4. What are the top selling laser cut items on Etsy?

I can only speak from my own Etsy searches and orders, not a trend report. The items that keep coming up for me are:

• Personalized keychains — wood or acrylic with names/initials
• Pet ID tags — stainless steel, which is a fiber-laser job
• Custom stainless steel jewelry — necklaces, dog tags, charm bracelets
• Wood ornaments and signs for holidays, weddings, births
• Acrylic cake toppers — thin material, usually doable with the diode side
• Anodized aluminum badges for corporate gifts

The mistake I made in my first year was making what I wanted to make, not what people were actually buying. I built maybe 40 wooden ornaments before someone asked for a metal pet tag. Now I keep a simpler rule: if it seems likely to ship in a padded mailer or small package, it's a better Etsy product. According to USPS (usps.com), as of January 2025, First-Class Mail letter is $0.73 and a large envelope starts at $1.50, but once your item is rigid or too thick, it becomes a package rate. Shipping is part of the product design.

Also, if you sell anything with a health claim—like 'food safe' cutting boards or 'hypoallergenic' jewelry—read the FTC advertising guidance on ftc.gov. You need to substantiate claims. 'Food safe' means different things for different materials; a laser engraving in a cutting board isn't automatically food-contact safe unless the finish is too. (Should mention: I mislabeled 'food safe' once and a customer called it out. It didn't turn into a legal issue, but it was embarrassing.)

5. Can you laser engrave silicone?

Yes, but it's messy, and 'yes' doesn't mean 'sell it with confidence.' I tried it on silicone wristbands and a phone case. The fiber source at 1064 nm left a visible light gray mark on black silicone, but the contrast wasn't strong. The blue diode source at 455 nm did very little. Results also changed depending on the silicone compound—clear, white, grey, and black all reacted differently. I don't have hard data on what mix of additives causes that; I just know you have to test each material.

If you're doing silicone for medical or food-contact use, I'd be careful. Some silicone releases fumes when lasered, and you need the right ventilation and material safety information. This is also where I hit my expertise boundary: I don't quote large silicone orders. It's not my specialty. A specialist who has the right laser and settings will do a better job than me guessing.

Oh, and don't expect the 'engraved' mark to look like a cut. It's usually more of a surface color change.

6. What's the biggest mistake you'd avoid if you started over?

Looking back, I'd buy the rotary attachment with the machine, not six months later. I didn't think I'd need it, and then a customer asked if I could engrave around a tumbler. I couldn't. The rotary cost me more later as a separate order plus the shipping wait.

I'd also track material settings from day one. I wish I had kept a notebook—or a simple spreadsheet—with power, speed, frequency, and the specific material. I still have a drawer of failed tests that would've been useful to future me.

And I'd be more honest about what I'm good at. Early on, I said yes to everything because I was afraid of missing income. One bad glass engraving order taught me to say, 'This isn't my strength; here's who does it better.' That lost me one order but saved me a bad review. I'd rather be a specialist who handles metal, wood, and acrylic well than a one-machine shop that claims it can do everything.