Homebrew PCBs

Thank you for your reply John.

I consider the problem to be (mostly) solved :)

The heat + powder method I described works very well. It adds 5 minutes to the process but the results are good.


Emil


On 31-08-12, John  <jferrell13@...> wrote: 
> One problem with the Laser discharge - electrostatic toner process is
> 
> that the characteristics of the phototconducter do not assure a uniform
> 
> density over large solid areas. I don't know the details so I will not
> 
> speculate as to any remedies. Simply copying the image to an inkjet at a
> 
> higher contrast level might serve your needs if you are not doing toner
> 
> transfer.  Also,  it would seem to me that a 2x copy from a laser
> 
> printer reduced to correct size on an inkjet might eliminate the voids.
> 
> 
> 
> Of course that brings its own problems like wet ink wrinkles and
> 
> tracking in the inkjet.  After a while it may turn out that accepting
> 
> the quality you have is not so bad!
> 
> 
> 
> My experience is from many years of field service with IBM equipment. I
> 
> learned long ago that I should pay attention to what a new operator had
> 
> to say about today's problems.  Frequently the newbie's fresh view led
> 
> the way to a better process!
> 
> 
> 
> Don't give up fixing the problem!