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Subject: Re: Epson direct pcb printing results

From: "Steve" <alienrelics@...>
Date: 2006-04-18

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> On Tue, 18 Apr 2006 17:42:42 +0200, Steve <alienrelics@...> wrote:
>
> > You are also dealing with the complication of the printer driver. To
> > get smooth-edged transitions between black and white, it mixes colors
> > to get grey tones in order to anti-alias edges without stark black
> > dots. Printer RIPs are a whole wide area of knowledge...
>
> Is there a way to switch that off, like "B/W only"? I don't really
want
> smooth edges with PCBs, do i?
> Is it a matter of printing with the color "usually in the cartridge"
on
> the screen to get to use this one or is there a way to tell the
printer
> which ink to use for which color on the screen?

You can use black ink only. In Printer Preferences, under Ink, click
Black.

However: you cannot tell the driver which color of ink to use any more
than that. To do that, you need an aftermarket RIP which is -very-
expensive. Thousands of dollars.

> > That would be good! A tiny bit of black carries a long, long way... I
> > make my cleaning cartridges by injecting my solution into old
> > cartridges, usually the old empty dry ones that I got with the
> > printer. This way I can see progress in the nozzle checks. Even
> > seemingly empty cartridges when mixed with the solution will yeild
> > perfectly useable prints. Not photo prints, for sure, but more than
> > enough for printing receipts and websites.
> >
> > So maybe mostly yellow with a small amount of black in the black, and
> > the correct colors in the rest. If the black is a little yellow-grey
> > on the component legend, that won't really matter.
> >
> > Steve Greenfield
>
>
> Yes, that seems good, and we know black is not really harming the
print
> since the original success was done with loads of black.
> Only drawback is more money to invest in ink. Would there be any
point in
> using the magenta at all if there is black in the mixture?

Why pick on magenta? It was cyan that Volkan said got printed into
black on some settings, and cyan that was worst as etch resist.

If you don't want any other colors, just use the yellow-black in all
heads, run from one bulk ink bottle.

Steve Greenfield