• 80% Grayscale:
Change the black in your graphic to 80% black to improve the engraving quality.
•
Jarvis Dithering:
Running with a Jarvis dithering pattern in the driver (you’ll find this under the raster
speed and power settings) will also help provide a smoother finish.
•
Masking:
Some people find that applying a thin, wet sheet of newspaper or paper towel a little
larger than the engraving area also helps with heat dissipation and improves the engraving. Just
be sure that there are no wrinkles in the paper after it is applied.
•
Dish Soap:
Using your finger or a paper towel, apply a thin coat of liquid dish soap – any kind will do
– over the area to be engraved. This will dissipate the heat when engraving.
•
Polish:
If there are small shards of glass, you can polish the area with a ScotchBrite pad or
something similar.
Note:
You need to be especially careful when laser engraving leaded crystal. The lead in the crystal
expands at a different rate than the crystal does and this can cause cracking and breakage of the
crystal. Using a lower power setting can help this problem, but we always recommend having a spare in
case of breakage.
Combining Laser Engraving with Sandblasting
Combining the best of both processes, you can use your laser to engrave the artwork then use
sandblasting to provide a deep etch into glass. Using the laser to create the artwork mask is an ideal
process for one-of-a-kind custom pieces as well as large production runs. This eliminates the photo
process usually associated with sandblast mask.
1. Apply an adhesive-backed mask material to the glass that you are going to engrave.
2. Laser completely through the mask and into the glass.
3. Remove the glass from the engraver and sandblast to the desired depth.
4. You now have a sandblasted glass presentation with the detail of laser engraving!
Notary Seals: Delrin
Notary seals can be easily manufactured using 1/16-inch (1.5 mm) thick delrin plastic. A seal consists of
two pieces - a male die and a female die, both shown below. The male die consists of white lettering on
a black background and the female die is an inverted and mirrored image of the male. Inverting and
mirroring are easily accomplished in most graphics software packages. Simply duplicate the male die,
invert the black and white colors, and then mirror the image.
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SECTION 12: ENGRAVING MATERIALS
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