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Subject: RE: Double or triple printing to increase ink density/opaqueness.

From: <beefyzee@...>
Date: 2013-11-07

Thanks very much guys.

 

Cunningfellow, the more I Google and read, the more I hear of people having issues with the lack of opacity from laser printers, and that's why industry used inkjets.

 

This weekend I'll be doing my first tests with my inkjet made positive transparenies on Kinsten PCB.

 

I ran some basic paper through my inkjet twice and the alignment was actually very good, at least good enough for the big fat tracks I always try to use as a beginner to this. The hairline width border around the board showed no signs of crossing, but looking close up the edges of the print were not as defined. Might be better on quality transparency and photo print settings.



---In homebrew_pcbs@yahoogroups.com, <andrewm1973@...> wrote:

> Keith wrote:
> Has anyone ever simply refed an already printed photo
> positive transparency to print a second and even a third
> time, in order to double/triple the density of the ink, thus
> increasing opaqueness.
> <SNIP>


For a laser printer it is only the large black areas that have opacity problems and need over printing.


Don't double print thin traces.


Shrink ground/power planes by a little bit more than your average misalignment.


Only print the ground/power planes on the 2nd/3rd run


Expect an occasional wildly different feed position to ruin a print.


Inkjets (for me at least) don't have an opacity problem.