Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "izzo47" <izzo47@...> wrote:
>
> Went to 3 RS for Ferric chloride all OUT....
> Reading old msgs, I finally found that Lowe's had it, a Gal was 7 
bucks.
> I bought some regular 3% Hydrogen Peroxide. It work well and fast 
but 
> would like any feed-back on the recipe I used.
>  1 part (200ml) 31.45% Muriatic Acid, 2 parts (400ml) Peroxide. 
Color 
> was light green, No heat used. Board went in first, pour the 400ml 
of 
> Peroxide on the board and in about 6 minutes it was done (small 
test 
> board) 3x2 inches. I did get a little scared when I measured the 
400ml 
> of Peroxide in the same plastic cup as there maybe was a drop of 
the 
> Acid still in there and saw smoke/vapors for a second. I noticed 
that 
> during the clean-up with water it turns a nice light blue, natural 
I 
> guess?
> Question is the recipe OK? Can it be fine-tuned.
> Can it be saved and brought back to life to use again? 
> 
> BTW if you can get your hands on the green tape they use at Wal-
Mart in 
> the Photo Dept to attach leader cards that go through the film 
> processor, get some. It will not melt or leave any residue I am 
sure of 
> that as a friend that works there gave me a roll.
>

Blue would seem to indicate the formation of Copper Sulfate crystals.