I love etching designs in dichroic glass. There are a number of methods doing this, but my favorite has always been to draw my designs on with a black sharpie, and then use Armor Etch to etch the glass. The sharpie works as a resist and the dichroic coating is removed everywhere that is not covered by the marker. Not long ago, I found another fun way to do the etching using rubber stamps and Stazon Metallic ink. I use the copper, because it seams a little thicker and tackier then the silver and gold.
You will need - a piece of dichroic glass (I like to work on clear dichoric so that I can watch the etching process from the back.), a rubber stamp, copper Stazon ink (and pad), Armor Etch etching cream, broad paint brush, rubber gloves, rubbing alcohol.
Wipe the glass down with rubbing alcohol to be sure it is free from residue. Press the rubber stamp into the ink pad and be sure the stamp is evenly coated with ink. Then carefully stamp the design onto the dichroic glass. Stamping on glass can be a little tricky, as the stamp wants to slide around if you do not come straight down and straight back up. But the nice thing is that if you don't get it right the first time, you can wipe it off with a little rubbing alcohol and try again.
Now for the fun part.......Put on your rubber gloves to protect your fingers from the etching cream. Holding the glass piece from the edges, brush a thick coat of the etching cream over the entire surface of the glass. Different dichroic colors etch at different speeds so it takes a little practice to get the timing right, but if you are working with clear glass it makes it a lot easier to judge when it is ready to rinse. Periodically hold the glass so that you can see the back side. You will see your design emerge and the etched area will become white. Tip the glass to different angles so that you can be sure that all the areas you want etched have turned white. If there is an iridescent sheen, it is not done yet. Once you feel it is ready, run the piece under clear water and remove all of the etching cream. The copper ink will probably come off at this point too, but if not use a little rubbing alcohol to remove it. Your dichroic design will be revealed.
You now have a lovely etched design to finish into a project. The pendant above was finished by fusing the dichroic glass to a piece of black base glass. For those without access to a kiln, I am working on a non-fired version of this....stay tuned.