Can You Engrave Glass with a Laser?
Yes, you can engrave glass using a laser, but not all laser types or techniques will work.
- CO₂ lasers can engrave directly on glass with the right settings.
- Diode lasers require a coating (such as black paint or masking tape) to help the laser energy bond to the surface.
- Fiber lasers are generally not effective on glass.
Best Types of Glass for Laser Engraving
Not all glass is suitable for laser work. Here's what works best:
- Soda-lime glass: Common drinkware and jars – engraves well
- Borosilicate glass: Heat-resistant – engraves with care
- Tempered glass: Avoid – likely to shatter or crack
- Crystal or lead glass: Avoid – inconsistent reactions and fragility
How to Engrave Glass Using a CO₂ Laser (No Coating)
If you have access to a CO₂ laser, follow these steps:
- Clean the surface with alcohol and a lint-free cloth
- Use low power (10–20%) and high speed to avoid overheating
- Defocus the laser by 1–2mm for smoother engraving
- Use masking tape or wet paper for extra protection if needed
- For cylindrical glass, use a rotary attachment to stabilize the engraving path
🖼 Insert here: Photo of CO₂ laser engraving a flat glass coaster.
How to Engrave Glass Using a Diode Laser (With Coating)
Diode lasers can’t engrave directly on transparent glass—but you can trick them with coatings.
Coating options include:
- Black tempera paint or dry-erase marker (let dry completely)
- Blue painter's tape or masking tape
Steps:
- Apply the coating
- Use high power (90–100%) and moderate speed (50–100 mm/s)
- After engraving, clean the coating off with water or alcohol
🖼 Insert here: Photo of coated glass with engraving test results.
Tips to Avoid Cracks or Poor Results
❌ Never engrave on tempered glass
🧩 Avoid large filled areas—use line art or outlines
🔍 Defocus slightly to soften beam impact
💧 Use damp paper towels to diffuse heat
🚫 Turn off air assist during engraving to prevent scattered debris
🔍 Inspiration from the Atomm Community
Looking for project ideas or proof that laser glass engraving works beautifully?
Explore dozens of shared tutorials and real-life projects from makers in our community:
🎨 100+ Laser Etching Glass Projects
Whether you're new to glass or ready to scale up your techniques, you'll find visual references and helpful tips from real users.
👉 Visit atomm.com and browse your next inspiration.
Frequently Asked Questions
Q: Can I engrave curved glass like a wine glass?
Yes! Use a rotary tool or jig to rotate the glass smoothly while engraving.
Q: What laser is best for glass engraving?
CO₂ lasers are ideal. Diode lasers can work with surface prep. Fiber lasers are not suitable.
Q: Can I color-fill engraved glass?
Yes! Rub acrylic paint or wax crayon into the etched area, then wipe off the excess.
Conclusion
Laser engraving on glass is totally achievable—even with a desktop diode laser. With the right glass, setup, and techniques, you’ll get clean results without cracks. Always test first, adjust settings, and don’t forget to explore shared test grids and tips in the Atomm Community to save time and avoid mistakes.
🪟 Try it on a recycled glass jar or wine glass—you might be surprised how elegant it looks.