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Re: My toner transfer experance
2016-01-03 by mosaicmerc@...
I use diluted nitric acid to etch copper. It works very well and lasts decades.
I have a carboyle of the concentrated stuff, diluted 3:1 with water as and when I need it.
My First carboyle (1 gallon) lasted 20 years as you can just add a bit more acid to strengthen the mix any time.