Okay - I've got my etching solution all working great now on aluminium - thanks everyone who responded to my previous posts, the Copper Sulphate solution works a treat!
As background this is for through and partial etching of thin aluminium plates (.5mm to 1.5mm) where quality and detail are fairly important but exact results are not critical. They will generally be bead blasted and anodised afterwards so a couple imprefections can easily be hidden.
I would also like to, on the partial-through etching, know if there is an easy way to imprint ink in the etched surface. Is it a matter of pinting ink on top of it before removing the mask? Are inks resistant to basic solutions that would be used (sodium hydroxide?) to remove the mask?
My current issues now are around getting a good mask. To date I've been using standard photoresist spray from a can (bought from Maplins in the uk) but I tend to get some bubbles, specs, weak areas, etc. regardless of how carefull I spray it.
I am thinking of using dry film and a laminator but wanted to get any feedback to what was best, cheapest and available in the UK.
I've dealt with mega before
Other then that is there any other photoresist system out there I should be looking at?
Thanks :)