Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "kilocycles" <kilocycles@...> 
wrote:when I etched, the Sharpie areas etched away much more than the 
>toner-covered areas (can't

I get that a bit as well. I'm usually extra careful now to let the wet 
Sharpie crap dry thoroughly, and then redraw over top of it once or 
twice, until it's nice and "dense" looking. I sometimes use a regular 
"fat-tipped" marker for wide stuff too.

I was wondering if there were any easy techniques for masking really 
large areas, like the whole back side, for instance? Seems like it 
might help for doing double-sided stuff, if you could hit it one at a 
time, while covering the other side with tape,etc. I hate trying to 
protect the delicate toner work on one side during all the pressing 
and heating for the second one.

-George