Hi,
I'm using an HP LaserJet 1300 set to "Dark" on 600dpi to print simple
PCBs (10mil or greater widths).
When I look at the masked areas under a microscope after etching with
sodium persulphate, I see a lot of porosity, i.e. little holes etched
in the black areas. I'm ironing quite heavily and the boards look very
solid when inspected under the uscope after the backing paper has been
soaked off so I don't think that this is an adhesion issue....
Is there anything that can be done to make the ink less porous? I note
that
http://www.pulsarprofx.com/ have what they call a green "TRF" that
is supposed to do this - anyone know what it really is?
Cheers
Nick