4. Best Application Scenarios for Each Type
When to Choose Fiber Laser
Fiber is your default choice when marking:
- Stainless steel, carbon steel, tool steel — serial numbers, logos, QR codes, annealing marks
- Aluminum parts — nameplates, anodized marking, ID codes
- Copper and brass components — electrical contacts, fittings
- Titanium medical devices — UDI codes, implant marking
- Carbide tooling — grade markings, size indicators
- Automotive metal parts — VIN codes, part numbers, traceability codes
Real example: A medical device manufacturer in Ohio switched from outsourcing their UDI marking to an in-house 20W fiber laser. Their per-part marking cost dropped from $0.45 to under $0.02, and they eliminated a 3-day turnaround wait.
When to Choose CO2 Laser
CO2 is the right call when marking:
- Wood products — personalization, decorative engraving, branding
- Paper and cardboard packaging — date codes, batch numbers, expiry dates
- Leather goods — logos, patterns, personalization
- Glass bottles and containers — batch codes, decoration
- Acrylic and rubber — part numbers, cutting and marking combined
- Coated metals — painted or anodized surfaces where removing the coating creates the mark
Real example: A craft brewery in Colorado uses a 60W CO2 laser to engrave batch codes and decorative designs directly onto glass bottles. The marks are permanent, elegant, and replace expensive printed labels — saving them roughly $0.08/bottle.
When to Choose UV Laser
UV is the specialist choice for:
- White and transparent plastics — high-contrast marks without additives (medical tubing, electronic housings)
- Silicone and rubber — catheters, seals, keypads
- Glass micro-marking — smartphone components, lab glassware
- Flexible printed circuits — PCB trace marking without damaging adjacent components
- Heat-sensitive polymers — where any thermal distortion is unacceptable
- Food and pharma packaging — cold marking on films and blister packs
Real example: An electronics contract manufacturer in Shenzhen needed to mark 2D DataMatrix codes on white ABS housings for a client’s IoT devices. Their fiber laser produced low-contrast, brownish marks. A 5W UV laser delivered crisp, high-contrast black marks on the same parts — the first-pass scan rate jumped from 60% to 99.5%.
