Mosaic
Well-Known Member
I use conc. Nitric (HNO3) mixed down 1:4 in water to etch copper clad boards using the Toner Transfer method down to 10 mil traces.
Results are good, no warming and very little agitation required as the etching bubbles on its own. The acid mix is gentle enough to get on hands for a few secs with no harm. No staining.
The mix is transparent and gets bluer as its consumed. By the time it's ready to be changed u can hardly see a board in 1" deep mix. For the most part I can see the board as its etching and know when to take it out.
The HNO3 can also be used to desmut aluminum for DIY anodising!
What type of etchants do u use and prefer?
Results are good, no warming and very little agitation required as the etching bubbles on its own. The acid mix is gentle enough to get on hands for a few secs with no harm. No staining.
The mix is transparent and gets bluer as its consumed. By the time it's ready to be changed u can hardly see a board in 1" deep mix. For the most part I can see the board as its etching and know when to take it out.
The HNO3 can also be used to desmut aluminum for DIY anodising!
What type of etchants do u use and prefer?