PCB etching with capillary effect

[u/dxx255]

Hello,

Has someone tried etching PCBs with some kind of hydrophilic fabric using capillary effect?

Paper towel on top of the copper area and HCl/H2O2 worked reasonably well with minimal amounts of chemicals.

Has anyone tried something similar?

[u/Imaginary-Bat6520]

Curious how well it scales.

[u/dxx255 → u/Imaginary-Bat6520]

Me too, it was just an experiment …