Homebrew PCBs

hi

if anyone remembers i was looking for a cheap H2O2 source.
It is available as Swimming pool chemical in a bottle, i think 30%.
but this is very hard to get, it is only sold for automatic dosaging units.

There is also some "oxygen" chemical sold for the pool which is in a solid form as granulate.
I wonder what this is, and if it would maybe also support the oxygen for regenerating CuCl2 bath.
I have no idea what this really is and on the labels it is seldom printed which chemical this exactly is.
If anyone has a idea please write.

another question is if anyone here is able to obtain a HPGL(1) file which has the holes for the parts 
leads left open in plot, this would aid in drilling as a guide. I can't get this to work and wonder if 
anyone has some experience here.


regards
stefan