How to Stop Struggling with Permanent Marks on Glass and Ceramics

Have you ever found yourself frustrated when trying to get a permanent mark on a glass or ceramic product? Well struggle no more because we’ve got something for you!

What is it? It’s a spray-on formulation that works on glass and a variety of ceramic substrates and allows you to create a permanent, charcoal to black colored marks. We call it Charcoal Glass, and it works under a large range of laser settings, making it very forgiving.

Below we provide you with information regarding the laser settings and application of the Charcoal Glass marking material so that we can help you optimize your results.

Laser Settings

GLASS: At 50 watts, you can start by running the laser at 60-70% speed and 100% power @ 600 dpi, but depending on the type of glass, you may also be able to run your laser at 100% speed. CAUTION: If you run the laser too slowly, the glass can fracture and cause the mark to flake off. This can be seen in the test grid below when running at speeds slower than 40%. On the other hand, you will know if you are running your laser too fast because you will see poor adhesion.  In that case, run the laser slower. 

TEST GRID: 100% Power, 600 dpi, variable speed

CERAMIC: At 50 watts, you can run the laser at 50% speed and 100% power @ 600 dpi.  Please note, however, that ceramic marks work well over an incredibly wide range of settings. 

TEST GRID: 100% Power, 600 dpi, variable speed

We recommend always setting up a test grid to optimize settings for your particular laser and wattage.


When spraying Enduramark Charcoal Glass on a glass or ceramic product, you should spray a thicker coating than you would when spraying our metal-marking products on metals. A good rule of thumb for glass is to spray the amount of material necessary for you to no longer be able to see through the glass.