I have yet to get a consistent result using Barker's reagent. I've done a fair amount of electrolytic etching but when it comes to Barker's I've never had any luck. I've tried different cathode materials, different concentrations of HBF4, various voltages, all to no luck. I recently tried incorporating a stir rod to keep the solution moving.

If anyone regularly uses this procedure, would you please share some pictures of your setup? I feel like I must be missing something simple here, as it's all over the literature but I've yet to have any luck with it.

Cheers!

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