Homebrew PCBs

Hi all a new member, just found your group, thought I would share 
some on my recent discoveries re; homemade PCBs.

Etchant: I use muratic acid (Ace Hardware) 1 part, Hydrogen Peroxide 
(Walgreens) 2 part, heat to 130 F, agiate with air, and dissolve 1 
Sq. In. single sided copper board per 1 oz. of etchant mix in about 
20 sec. Advantages; cheep $.10 per oz.; very quick; clear, you can 
see the copper vanish; safely dispose of 8oz. in 2 gal. of water 
down the potty, and most importantly the hot quick action seems to 
elimiate the pitting of the copper that a slower etchant bath 
produces. Disadvantage: this solution saturates quickly and 1" 
single sided board per oz of solution is close to the satuation 
point, beyond which further etching ceases.

Etchant Tank: Plexiglas pipe 1/8 side wall, any diameter you want, 
available at any local glass shop that advertizes plexiglas. Heat 
the pipe in the kitchen oven at 250 F for 15 min. and strech it over 
a wooden (1x4,1x6,2x4 etc) mandrel to form a oblong tube. When cool 
pound out the mandrel. The tube shoud be about 2" longer that you 
want the finished tube, so that you can cut off about 1" at each end 
to remove the heat damaged ends. Cement the tube upright on a piece 
of 1/4 plexigal sheet to form a base. The glue is the universal PVC 
glue (Ace Hardware). Airate, with 1/4 clear PCV pipe plugged at the 
end and perforated with a hot needle, aquarium air pump or 
compressor, make a value by folding the air hose and pinching the 
fold together at the exact spot with a clothes pin. Heat the tank 
with a household heat lamp. Do the job outside!!.