Homebrew PCBs

I looked through the files section and didn't see what I am looking
for (it may be there, I just don't know one chemical from another).

I am looking for an etching solution that I can get or make from
common materials (hardware stores, etc.) that works good and is also
clear.

The stuff I have used so far came in the Radio Shack kit and was dark
brown in color - made it very difficult to monitor the etching
process. Others here have mentioned some chemical that is clear and
works good.

Hope you can help!

Chris