Rowmark Fibergrave on Fiber Laser

I am trying to mark Rowmark FIBERGRAVE (Black) for outdoor plant labels. Anyone tried this before? I’ve tried a ton of settings and can’t seem to get it quite right. I have a 30W OMTech Fiber Laser. Thanks in advance for any tips/ advice.

See if this helps…

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I read that. They tell you the settings for the white but not for the black (for Galvo). I tried the settings for the white but the results were terrible. I have spent hours tweaking it and have “ok” settings for now. I would love to know what other people are doing to make this work. Much thanks for your reply.