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The Amazon page says: *** 35% Reduced to 12% *** -- Steven Greenfield AE7HD

I hafe to add my experience with aerating etching solutions.? I had a tank using ammonium persulfate.? I etched in a closet in my carport.? After a dozen or so, i looked and the heads of all the

Before calling someone a liar, you would be wise to investigate, though I was wrong that they sold 33%.? Actually, it is

I seriously doubt that Amazon sells 33% H2O2. It's a significant pain in the neck involving considerable additional packaging precautions, with attendant higher costs and liabilities, to ship

Received from Harvey White at 3/23/2019 07:08 PM UTC:

I can almost guarantee it will... Never had any that lasted. If you can't do that, then you

The "top up the solution" is meant to add enough H2O2 to restore the solution to good operation, but NOT to replace a lot of water. You want to maintain the overall concentration. The goal (I think)

High concentrations of H2O2 result in VERY exothermic reactions. Etching takes place in seconds. Lots of heat. Lots of acrid fumes. Do outside or with a good hood. Have water available to put your

Received from Dave at 3/23/2019 04:30 PM UTC: At your local pet/aquarium store. A fritted glass bubbler will be all glass... a glass tube with an enlarged porous end on it. Describe it like that if

33% can be obtained from Amazon?Sent from my T-Mobile 4G LTE Tablet

Noted. Thanks, Dave

My wife owns a beauty shop so I already have a gallon of the good stuff. :-) But she did buy it from Sally Beauty Supply. Thanks, Dave

Thank you very much Jim. Great info and very helpful. I really appreciate it. :-) One question though, when I look up "fritted glass bubbler" I mainly find bongs. Where is a good place to buy a

OVERVIEW: This is a simple procedure for preparing 1 liter of cupric chloride etching solution. The tradeoff for the simplicity is a bit of patience as it may take a while to complete the

Do be careful, since the drugstore concentration is far less than the various products available in beauty supply stores. I'd think that the best use is as follows: 1) build the etchant with

I found Sally Beauty Supply to be a good source for H2O2. I recall the "volume" rating is a bit more than 3x the concentration, so "30 Volume" H2O2 is 10% concentration. Donald. -- *Plain Text* email

Thanks Steve, ? I guess I almost knew that. :) I just haven't mixed any up yet. I read somewhere about sacrificial copper wire and I guess just etching some boards does the same thing, but if you

" Could you explain more on how to make the mix with the copper wire? I like the idea of less corrosive fumes. " Cupric chloride is what that sounds like. If you mix hydrochloric acid and hydrogen

Thanks for the info. Probably top secret values on those 2 components. :- Dave

Cool, thanks for taking the time to test/verify that. Dave