Homebrew PCBs

On Tue, 11 Apr 2006 13:10:59 +0200, Kamal Shankar  
<kbshankar2000@...> wrote:

> Guys, can you give me a rough idea about how long the
>
> Ferric Chloride powder remains powder before turning
>
> to thick liquid ?
>
>
> I am used to purchasing FeCl3 in form of a deep brown
>
> syrup, but am considering getting something dry from
>
> now on.
>
>
> Oh - and how would you recommend Ammonium Persulphate
>
> from the storage point of view ?


Back then when i bought FeCl it came in vacuum packed PE bags with just  
enough in each for making up one bottle.
As far as i can tell the unopened bags are still dry after many years. A  
good sealing glass bottle should keep it dry indefinitely i think.


ST