Andy Darlow (andy@andydarlow.com)
Fri, 08 Jan 1999 22:38:09 -0800
Andy Darlow wrote:
> -Let me preface this by stating that I have not output seps to my Epson Photo and
> PhotoEX printers, but I have output many greyscale, RGB and CMYK images to my
> printers and I have years of experience with seps on Scitex and Agfa imagesetters
> for so here's my take on the subject at hand.:
> (This is to avoid having to use Quark XPress/Pagemaker to produce sep. negs).
>
> As far as separations are concerned, each plate (C,M,Y, or K) will be black if set
> up properly(my gut feeling is to make 4 greyscale files with the plates from each
> of the CMYK channels placed in their own greyscale file). Dont forget to invert
> the files, or you will get interpositives! For daring users, you may wish to
> convert each greyscale into RGB or CMYK and output that for a smoother effect. The
> resulting negs should then look more like cont. tone negs (Dan Burkholder please
> chime in if another idea comes to mind).
>
> Each plate will have a different density, just like they will look in the original
> CMYK file. (Hit ALT/Command ~123 to see this in PS5) The black plate will vary
> wildly depending upon the black generation chosen (I'd recommend GCR with 90% max
> Black, 290 total ink and Med Blk Gen to start).
>
> As Katherine indicated from the epson list, the printers will convert a CMYK to
> RGB if the Epson driver is used. In this case, it really doesn't matter because
> if you've followed the above procedure, you have determined the basic look of all
> your beautiful negs!
>
> -Thanks for an exciting list and I double the recommendation to join the epson
> inkjet list. Be prepared for up to 100 messages daily!
>
> By the way, the film chosen is critically important as some will run and others
> will never dry. Anyone out there who can recommend a good inkjet film for contact
> printing? I tried a transparent film a while back and it was terrible!
>
> -Andy Darlow
>
> Michael Keller wrote:
>
> > I've stayed out of this til now cause I felt I didn't know anything about it,
> > but I have to question the comment below. If you use Photoshop to create
> > separations to print out on your inkjet, wouldn't Photoshop be generating four
> > BLACK images, which the printer would see as black images, not CMYK or RGB?
> > IOW, your printer doesn't know they're CMYK or RGB, it just sees four pages of
> > black printing. Or is my head up my...er, nevermind.<g>
> >
> > Katharine Thayer wrote:
> >
> > >
> > > settings. A good place to start to find this out this is the excellent
> > > list epson-inkjet, at http://www.leben.com. On that list yesterday I saw
> > > two mentions to the effect that if you send a CMYK file to the epson
> > > driver, it changes the file back to RGB and then to its own CMYK space.
> > > That would make me very nervous, if I were getting my separations that
> > > way. When you print in color on an inkjet, you send the file to the
> > > printer in RGB and let the driver change it to CMYK, rather than
> > > converting it before sending it, or you get really weird colors, for the
> > > same reason.
This archive was generated by hypermail 2.0b3 on Sat Nov 06 1999 - 10:06:41