Sandblasting can create an etched look but requires special equipment, doesn’t always achieve precise results, and can produce dust that can damage the lungs. Laser engraving is the best option for glass and offers exceptional precision.
Start by choosing “Laser Cylindrical” in XCS, and verify that the red light touches the highest point of the glassware. Then hit process to begin engraving!
1. Wear Eye Protection
Laser engraving machines emit powerful light beams that can damage the eyes if not properly protected. Laser safety glasses filter out harmful wavelengths and help prevent irreversible eye damage. Laser safety glasses should be able to withstand the wavelength of the laser you are using and should have a certification mark like CSA to verify compliance with industry standards.
Before you start engraving, take a moment to prepare your work area. Ensure that the glassware is within the designated working area and that your printed design fits snugly on top of it. When you are ready, select Framing in your engraver’s software to see where the laser will etch.
If you have a choice, choose a higher power setting for better results on harder materials like glass. Engraving a glass bottle with a lower power setting can cause lines to appear smeared or undefined, and you’ll also risk damaging the item. You may also wish to use a marking paper, which provides additional protection against direct and hazardous reflections.
2. Wear Respiratory Protection
If you use an etching cream, which contains a diluted mixture of chemicals that lightly "eat" away at the glass surface, you'll need to wear latex gloves and safety glasses. The chemical mix can irritate bare skin and damage it if it comes into direct contact with it.
Laser engraving requires fewer precautions than etching cream, but you still need to take a few steps to prevent injuries. Make sure the work area is well-ventilated and that flammable items aren't nearby. It's also a good idea to wear a respirator when operating the laser.
You can use a simple respirator that's designed for industrial jobs, such as this one from 3M. Ensure you choose a model that complies with Class 4 laser safety standards. It will have an automatic shut-off feature when the lid opens and a safety lock that's activated if you press down on the trigger. It will also have a filter to remove harmful particulates from the air.
3. Wear Heat-Resistant Gloves
Engraving adds a personal touch to any glassware item, elevating it from an everyday item to a treasured keepsake. While the process is fast and simple, there are certain safety precautions that must be followed to prevent injury or damage.
The most common risk associated with engraving glass is splintering. Small fragments of the etched glass can break off during the laser processing, leaving behind sharp edges and uneven surfaces. This can affect the overall quality of the finished product.
Using masking paper or dedicated laser masking paper to cover the surface of your glass can reduce this issue. This also helps reduce chipping and improve the quality of the final engraved design.
Chemical-resistant gloves are essential for whiskey decanter set handling etching creams. These gloves should be made of materials that can withstand corrosive chemicals like hydrofluoric acid and ammonium bifluoride.
4. Keep Your Hands Clean
Ensure your hands are free of dust, dirt and fingerprints before handling an etched surface. Handling a dirty surface can reduce the clarity of your design and cause the glass to become scratched or damaged.
Use a rag or paper towel to remove oils and fingerprints from the surface of your glassware. Thoroughly cleaning your glassware will help to produce crisp, clean results when engraving with acid-based products like Armour Etch.
Some people find that coating their work area with a layer of liquid dish soap (any brand will do) helps to protect their surfaces and dissipate heat from the laser cutter when etching. This method of prepping your work area can also help to prevent scratches on the table when removing and resetting the pieces for the next run.
