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Received from Rob via Groups.Io at 3/24/2019 02:55 AM UTC: 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

Received from Dave at 3/24/2019 02:25 AM UTC: I don't like ferric chloride (FeCl3) because the solution is too dark to observe the progress of the etching and it doesn't change color appreciably as

Volume 30 H2O2 is a hair under 9% H2O2. I see no real added value to using etching solution high in H2O2. If it's used one shot, the extra H2O2 is wasted. If the solution is stored and reused only

30 volume hydrogen peroxide is not the same as 30%. 30 volume (or V30) is 9%. Google "hydrogen peroxide volume to percent". ? There are a couple of sellers on eBay selling undiluted 35% hydrogen

Works for me. I am taking a lot of notes and everything is leaning towards the same conclusion. :) Thanks, Dave

I know that. It says so right on the bottle. But my wife knows it as "30 Volume" as that is the strongest you can get from the beauty supply store. Thanks, Dave

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%

Craig, ? Thanks for the info on your splash tank. I read all the posts and take mental notes so in the future I may refer back to them. For now my needs will be very limited. I was going to make a

Beauty Salon H202 is 30 "VOLUME"? not 30%? its more like 12%

Craig, ? Well I am going to have to buy a hand piece to use my new power supply ( I got a very low serial number (26xx) unit as it seemed like a deal ) so that is what I am looking for now. I may

If you want to be quick and efficient doing your own boards build a splash tank.? I built one years ago and it did may boards before I quit doing them myself.? My tank could etch two 10" x 10"

As Harvey said, it is to put the Oxygen back into the etchant without diluting it too much. It is much easier to dilute 30% H2O2 than it is to concentrate the 3% solution. Adding sufficient O2 with

Plastic wins. I like the "easy" part that goes with it. Thanks

Good point.

I have a bottle of FeCI from RatShack I bought 15 years or more ago still unopened. Read all kinds of stories about that stuff. Being I am a noob just starting I read all the comments and I may try

It's pretty much moot now since what I was describing originally seems to no longer be available from aquarium supply stores... and from lab supply houses will run close to $300. That said, I wasn't

Mark, ? Yes, I am aware of the issues although I haven't made any solution yet. I was more worried about my shop equipment getting rusted. And my lungs too. But I decided I would do my etching

You most likely need a hand piece to test the Metcal.? I believe some of the power supply models have open circuit shut down capability.? So if you don't see any RF at the connector that is not