Homebrew PCBs

> http://www.willcoxonline.com/PCBplotting/main.html
> > http://www.qsl.net/ve2emm/pcb/pcbe.html
> > > "Circuit Board Plotting 101. Curt describes how to draw PCB 

Oh guys. I did this 15 years before :-)
But the process isn't stable. Very often the tip smears as it reaches 
earlier drawn traces or pads (T-connections) or thicker traces that 
needs to be drawn with parallel lines. After tryinig a lot different 
pens (Staedler I used too) and several costy steel-tips with lots of 
different inks I switched back to photoprocess. May be my plotter is 
too fast.
 By the way: The best "ink" I used was colophonium in isopropyl 
alcohol. It is a good and cheal resist and you don't have to remove 
it, just solder. And if you draw the lines with a tinned solder iron 
the board is quickly tinned and stable for years. there is only one 
small disadvantage with colophonium alcohol ink: it is very 
transparent. Therefor i mix one or two drops of staedler refill ink. 
You may try this... Nowadays I prefer toner transfer. 
Later on I want to try to print with a modded Lexmark Optra R direct 
to copper (by removing the fixer unit) and fix it in the oven. I'm 
sure it will work, but I don't have the time for such playing now. 
next year perhaps :-(

May be someone trys this earlier

Martin

Lexmark Optra R or L is a 1200dpi printer that can print in a very 
even tray and is capable to give lot toner for very dark prints.