[sdiy] making PCB's with PNP blue

[aankrom]

OK, I'm sure we've all talked about making PC boards on this list 
before, but when I googled how to etch PB boards, I got a lot of hits 
and none seemed to really tell me what I wanted to know.

I plan on etching the boards in a Pyrex cassarole pan heated with a 
heat lamp connected to a Variac. How hot should the bath be? I have a 
cool electric thermomter, but it needs a thermocouple. I s'pose a candy 
thermometer will work...

I have solid FeCl3 to mix. It says 1/4 lb makes a pint which doesn't 
seem like a lot. I'm expecting the dissolution of the FeCl3 to be 
exothermic so I won't mix it in a plastic container.

When "ironing" on the PnP with circuit pattern do you really put the 
iron right on the PnP or should you put a piece of paper in between? How 
long is long enough?

Does anyone know of a definitive link eprhaps?

Anthony