Hard Ground Etching 

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@@Lauren-ily2 Yes you can, but with hard ball grounds such as this, temperature is important. A griddle with a thermostat would be ideal so you can set it (more) precisely, but even if it has a low-med-high dial or something like that, you’d probably be fine. Good luck!

@@professortruszkowski Awesome! Thank you!

For “ball grounds”, applied with a roller on a hot plate, I use Charbonnel brand. Unfortunately, even with a good backup supply, I am about to run out and it seems impossible to find now. I have experimented with Graphic Chemical brand hard ball ground and it works well but seems to need higher temps to melt it to the plate. I have lots of this so that’s what I/we will be using in the near future. For liquid hard ground, I use Graphic Chemical brand. It works well for when we need it (usually doing a “lift ground” process). Good luck!

@Professor Truszkowski Thank you for your answer! I just started using Trilobite Hard Opaque Ball from Takach Press. There is almost no information about it. We'll see if it's OK.