Using the correct power and speed settings for your laser is critical when working with CerMark on glass. I’ve used the CerMark 6044 product for over 10 years. Based on that experience, I recommend using a power setting of 100 percent. The speed setting for the laser should be set using the formula of taking the rated laser power as the speed setting. If you have a 50-watt laser system, set the speed to 50 percent.
Keep in mind that the laser bonding process for CerMark on glass works a little differently than you are used to. The focused heat energy from the laser will cause the CerMark to bond to the glass. However, an engraving speed that is too slow will have too much heat energy and cause the glass to chip and flake off. The engraving result will be a coarse look that is gray in color. Conversely, an engraving speed that is too fast will not allow the CerMark to bond to the glass, looking patchy with sections of engraving missing.
After the laser engraving is complete, it’s time to wash off the unengraved CerMark coating with water. As soon as the water comes in contact with the unengraved CerMark on the surface of the glass, it will immediately soften and easily wash off. A soft scrub brush can also be helpful to remove the CerMark coating that is in any highly-detailed areas.
Finish the project by drying off the glass with a soft cloth.
—Mike Fruciano, Fruciano Consulting