Homebrew PCBs

On Sat, 05 Feb 2005 21:17:41 -0000, Phil <phil1960us@...> wrote:

>
> I had toner spreading (AKA trace bloom) problems when using heavily
> coated papers.   Using less coated paper such as ink jet paper seemed
> to solve the problem for me (or at least, control it).  It appears
> that the excess toner is being absorbed by the paper rather than being
> squeezed between the clay coating and the copper.  Also, controlling
> the amount of toner helps somewhat with the coated papers - I use a
> copier so I can tweak the toner level to what ever I want.

The bad thing is if i reduce the toner density i can't make good ground  
planes any more.
The HPIIID has a nice analog pot to set print density, i hope the lexmark  
printer has at least some software setting, it certainly doesn't have any  
analog pots.

You are right with the paper, glossy is bad, matt is good, the toner seems  
to fill the gaps rather than spreading. Of course fusing pressure and no.  
of passes is a big influence too.

ST