leon Heller wrote:
> ----- Original Message -----
> From: "Matthew Mucker" <matthew@...>
> To: <homebrew_PCBs@yahoogroups.com>
> Sent: Sunday, January 04, 2009 11:15 PM
> Subject: [Homebrew_PCBs] Shelf life of HCl/H2O2
>
>
>
>> I etched my first board a few weeks back with HCl/H2O2 and was very happy
>> with the results.
>>
>> I saved the etchant, since I'd only etched one small board with it, and
>> today tried to etch a second board. I saw no evidence of a chemical
>> reaction at all.
>>
>> Now, I know that H2O2 will spontaneously decompose, but it seems that the
>> etchant should last longer than a couple of weeks. Has anyone else had
>> issues with storing etchant and using it at a later date? Is there
>> anything
>> I can do to increase the shelf life of my etchant?
>>
>
> You need to make up fresh etchant each time, it doesn't keep.
>
> Leon
>
Leon
I found a bunch of Curric Chloride (HCL+H2O2) links on Answers.com
that say it does keep.
I even went back in my archived mail and found a message from you, on
Feb 22 2006, where you
said you stored yours in plastic Milk bottles.
I hope you just forgot because I just got together come HCL and 30%
H2O2 to ecth a bunch of small
boards. I was sure I had read some time ago that is did store for a
long time with rejuvination.
Am I mis-remembering, which I seem to be doing a lot lately, or has
something changed.
Wayne