The CO2 vs Fiber Mistake That Cost Us a Rework (and What It Taught Me About Transparency)

A while back, a support ticket came in that had absolutely nothing to do with manufacturing. Someone asked, in French, how to "brancher une vmc sur un interrupteur"—wire a ventilation fan to a light switch. Not our job. But it stuck with me because it's such a perfect example of two people using the same words and meaning completely different things. That theme came back a week later, in a much more expensive form.

I'm the quality and compliance manager at Shapeways. I review every part before it reaches a customer—roughly 50 to 60 unique orders a week. In 2025, I've already rejected about 8% of first articles for spec mismatches. Most were preventable. This one was, too.

The Order: 1,000 Parts, One Logo, No Laser Spec

A startup ordered 1,000 small plastic housings through Shapeways. They were headed to a trade show, and they wanted their logo engraved on each housing. Simple enough. The product was 3D printing at its most straightforward: a black nylon-like material, a clean shape, and a laser engraving to give it a branded finish.

The order came through with "laser engraving" in the requirements. No mention of CO2 or fiber. Our quoting system automatically assigned our standard engraving process, which at the time was based on our CO2 laser. They accepted within an hour.

That fast acceptance should've been a red flag. When someone approves a quote that quickly, they usually don't know what they're approving. I'm not saying that to sound superior—I've been on the other side many times. You see a number, you click accept, and you assume the vendor is going to interpret "laser engraving" the same way you do. Sometimes they do. Sometimes they don't.

The Sample Looked... Off

We ran the first handful of parts on the CO2 laser. The engraving was readable, but the edges had a heat-affected look—a faint brownish charring right along the lines. On black material, it wasn't glaring. But it wasn't crisp, either.

I flagged it before sending the sample. "This might not meet their expectations for a logo," I told my colleague. He shrugged. "They said laser engraving. This is laser engraving."

He wasn't wrong. And I don't blame him for the shrug. The problem wasn't our process or his attitude. The problem was that we never gave the client a choice between CO2 and fiber in the first place. We made the technical decision for them, based on what was cheapest for us to run.

The Client's Reaction: "We Wanted the Clean One"

The client replied with a photo from another vendor's site. The logo was sharp, high contrast, no discoloration. "Like this," they wrote. "The fine detail version."

That's when it clicked. They wanted fiber laser engraving. Not because they knew the term—they just knew what the result should look like. And we never asked. We both said "laser engraving" and meant different processes. Sound familiar? It's the same conversation as the French ventilation fan, just with a bigger price tag.

Here's the part that stung. Fiber laser engraving costs more on that material. Not a huge amount—maybe $0.40 more per piece—but on 1,000 units, that's an extra $400 in laser time, plus file prep. If we'd quoted that upfront, the client would've paid it. They weren't looking for the cheapest option. They were looking for the right one.

But we didn't quote it. We quoted the low number. And now we had to decide who ate the difference.

The Rework, and the Transparent Fix

Our sales rep wanted to charge a change order fee. "They didn't specify fiber," she said. "It's a spec change."

Technically, she was right. But it was also our fault for not offering the choice in the first place. The customer didn't know enough to ask the right question. That's exactly why the quote process exists—to surface decisions like this before they become expensive surprises.

Honestly, I'm not sure why the CO2 laser left those marks on that particular material. My best guess is the black pigment absorbed more heat than the gray we'd tested with. The material supplier might have an answer, but we never dug into it. We were too busy fixing the mess.

What mattered was being straight with the client. So we were. We told them: "We quoted CO2 engraving. For your logo, you want fiber. Here's the cost difference, and here's what we're willing to do." We covered the labor and the second round of shipping. They paid the material difference. The total upfront cost would've been about $380 higher than our original quote. Instead, the rework, the extra logistics, and the two-week delay cost us more in real money and in goodwill. The "cheap" quote wasn't cheap at all.

What I'd Do Differently Now

Every engraving order now gets a follow-up question: "CO2 or fiber?" And we attach a comparison image showing the difference on the exact material and color the client has selected. Not the polished marketing version—the real one. The whole laser engraving CO2 vs fiber question comes down to how much detail your logo actually has. A simple wordmark might be fine with CO2. A fine logo with tight corners needs fiber.

We also ask for vector files upfront. That sounds basic, but you'd be surprised how many clients upload a web-resolution PNG and expect it to look sharp on a physical part. It won't. We've had that conversation three times since this incident, and at least it's happening before production now, not after.

There's a broader lesson here. In custom manufacturing, the cheapest quote is rarely the true cost. If a vendor doesn't ask clarifying questions, they're probably not thinking carefully about your project. And if you're the buyer, ask what's not included before you ask the price. One client calls this the "what's NOT included" test. It's a good one.

Transparency isn't just about listing fees. It's about making hidden choices visible. The CO2 vs fiber decision was hidden until it wasn't—and then it was expensive.

A Quick Note on Environmental Claims

One more thing, since we're on the subject of clarity. Some clients want to print "100% recyclable" on their packaging or even on the parts themselves. Per FTC guidelines (ftc.gov), that claim has to be truthful and not misleading. The FTC Green Guides are pretty clear: if a product can't reasonably be recycled by most consumers, saying it's "recyclable" can be a problem. If a part is made of mixed materials, or if the engraving compromises recyclability, that claim could get you in trouble.

We're not lawyers, and we don't give legal advice. But we do point clients to the FTC's Green Guides and suggest they verify their claims. A claim you can't back up is a product recall waiting to happen.

Bottom Line

That French ventilation question—"brancher une vmc sur un interrupteur"—wound up in a spam folder, probably. But it taught me the same thing as the engraving order: when the people on two sides of a request aren't speaking the same technical language, someone's going to pay for the misunderstanding. Make it the quote stage, not the rework stage.

If you're wondering what the Shapeways logo has to do with any of this: not much. The logo on our site and packaging stands for our platform. But when you order parts, the only logo that matters is yours. Our job is to make sure that logo looks exactly like you expect it to—or to ask the right questions when we're not sure that it will.

And if you're wondering whether your part should use CO2 or fiber laser engraving, ask your vendor to show you samples on your material before you commit. If they don't offer to, that's your answer.