I will need to bust out the 0.15mm copper and directly compare to my 0.15mm nickel, but I have been thinking Nickel is more malleable than the copper in terms of pressing it down around the cathode’s button
I suspect the Sheets of copper are somewhat work hardened through the extrusion process. but annealed copper would likely be softer.
I don’t recall if I raw dogged 0.15mm copper, but I know I can.
Pretty sure I was welding 0.2mm copper no sandwich but with Flux, and was able to get excellent welds, but the strip tore too easily from the cell at the edge of the welds, IIRC.
Removing the CUSS sandwich easily distorts the cell can, especially with my 0.25mm copper.
Perhaps 0.25mm Cu no SS sandwich with flux is within range of the p20b
I will have to check the other thread to see how much ‘gear’ I was using for 0.2mm copper no sandwich with flux. I’ll likely need 33% more ‘gear’ than that.
Edit: looks like I stacked 0.1 and 0.15mm copper no Sandwich with flux at gear 850.