There are a number of methods for laser engraving glass and creating special effects. Here are few:
1. Moist paper towel
Using a moist paper towel helps prevent the engraving area from becoming rough, and leads to a clear, white engraving result.
Before you start engraving, apply a moist single-layer paper towel to the glass. Make sure there are no air bubbles or overlaps as this will affect the engraved image. Then switch the Air Assist to OFF to avoid premature drying of the paper during engraving. After engraving, the residue easily wipes off, also cleaning the engraving area is cleaned.
2. Application tape
In addition to moist paper towels, application tape can also be used to prevent the surface from roughening. With application tape, however, the engraving colour is grayish rather than bright white.
As with the paper towel method, make sure that no air bubbles and overlaps are formed when you apply the tape. After engraving, clean the glass to remove any adhesive residue.
3. Engraving without auxiliary materials
Moist paper towel or application tape are not required for processing glass. You can create effects by making adjustments such as changing the colour in the graphic from 100% black to about 70% gray to minimise the effect of heat on large surface, to optimise engraving results. You can also go to the print settings, select the rasterisation type “Ordered Dithering," but keep the same parameters. Due to this change not quite as much heat enters the material; hence, the surface is not roughened as much.