Homebrew PCBs

hi

i just had a idea while i was looking for H2O2 in pool supply.
I didn't find anything today in a shop who carries pool chemicals.
so i had another look with google and found out that phenol red is sold as these small tablettes which 
are simply thrown in the pool water sample.

i have some of them left here and i think this is a convenient source for anybody who has no access to 
distinct chemical supplies. i believe this pool chemicals can be bought anywhere.
if there is some disadvantage (other than maybe the higher prize as you can use smaller amounts from a 
bottle) please tell me.


i also discovered a h2o2 source.
NEPTUTOP is 25% H2O2
and there are also other brands like "hobby-top" (local one i think).

i have no price for neptutop but 5 liters 35% hobby-top h2o2 costs 20eur.
this is much below the price i pay for it as lab chemical (i remember ~~10 eur for only 250ml).
i also hope it has more stabilizer in.

i really believe with this cost / etch i won't start the bubbling campaign.
this seems much to high effort (concerning the corrosive fuem discussion also).
and also the etch time is much lower with fresh peroxyde in there.

i think anyone can find a h2o2 pool additive where he is, sold under different brands.

regards
st