Homebrew PCBs

a 1% solution of NaOH (10 grams per liter) develops a board in less 
than a minute -- I find it helpful to develop under a red darkroom 
lamp (yes, I do BW developing as a sideline).  I use 2 glass baking 
trays one for the sodium hydroxide solution and one for water.  The 
red lamp is on all the time.  I periodically switch on a "white" lamp 
to examine the board.  

Caution with Sodium Hydroxide -- over time the pellets (or granules) 
will absorb water -- as you open and close the bottle in which they 
are contained -- the moistened pellets will stick to your skin and 
cause blistering -- so latex gloves are a good idea.  I use filter 
paper to weigh out the sodium hydroxide and find that over time the 
little beads of NaOH will also stick to the filter paper -- not a 
good idea to "flick" them off since they then go everywhere.  

Drano is mostly NaOH, but there's a lot of impurities in it.