Received from Rob via Groups.Io at 3/24/2019 02:55 AM UTC:
I'm not a chemist.
Some of you guys a talking chemistry I haven't seen since high school 42 years ago.
I etch with Muriatic acid and peroxide ...... 30% HCl 3% H2O2
which is diluted with a LOT of water.
What is the advantage of using tanks and bubblers and all these precision mixtures calculations?
I add 50ml of HCL to 100ml H202 and it always "just works".
Yep, it works, but then what do you do with the solution that we can only assume you mix up fresh each time? Few if any of us have a place to legally dispose of multiple one-time batches of solution containing copper chloride, so we're discussing solutions that can be regenerated and reused many, many times.
Jim H
