> If I make the pdf's with (for?) 2400 dpi, no compression,
> other options as suggested, is it possible for the printer
> to use them if his imagesetter ouputs, say, 1270 dpi?
> As somebody suggested in another thread, a lot of us are
> confused about the proper ways to create pdf's. Apparently
> one should know the dpi/linescreen settings for the specific
> output device and maybe also take the imposition s/w in
> consideration somehow. But if these are not known, how to
> make an educated guess? Better not?
It's always best to talk to the printer ahead of time, but here are some
general guidelines (note: I am not a PDF expert, this is just what works
for me, I'd love to hear what more experienced people have to say.)
-->Compatibility: Acrobat 3
A lot of rips and imposition programs have problems with Acrobat 4.
--> Don't "Optimize PDF"
I have no idea why, but people tell me that "optimizing" can*'em up.
I set this to 2400 'cause that's what I image at. I have no idea what
Acrobat actually does with this information. Is it for calculating
flatness and stuff? Anyway, it doesn't seem to matter if you output to a
lower res device, so I wouldn't worry about it.
I just leave this at the default. Does anyone know what the hell this does?
-->for Color and Grayscale: Bicubic Downsampling at 300dpi
This is an adequate setting for printing up to a 150lpi screen. If
you're printing a much finer screen (like that 1100lpi job I heard
about, Wow!) you might want to set this higher or leave it off
altogether. But for 99% of print jobs this is a good setting.
-->for Color and Grayscale: Compression: Automatic & Quality: Maximum
There still exists a great Fear of Compression, but don't fall for it.
Turning a 180MB EPS into a 1.3MB PDF is one of the great joys of
Distiller. JPEG compression will slightly degrade an image (not visible
to the eye, but if you were to extract the image and edit it you might
notice something) so if you're super-paranoid, you might set compression
to ZIP, which will not degrade the image.
-->for Monochrome Bitmap: no downsampling
For bitmaps, the more dpi the merrier (up to the res of the image
setter), so leave this off. And they don't take up much space if you set
-->for Monochrome Bitmap: CCITT Group 4
All four of the options here are lossless compression, so you have
nothing to lose by turning it on. I don't really know which one is best,
so I just leave it at the default.
--> Compress Text and Line Art ON!
Again, nothing to lose, so turn it on.
--> Embed All Fonts ON!
What's the frickin' point of PDF's if we don't embed all the fonts?
--> Subset OFF!
Might as well embed them all, while we're at it.
--> When Embedding Fails: Cancel Job
This way you won't accidentally make a PDF without fonts. Some fonts
won't embed, so if you need to make a PDF with those fonts you must
temporarily turn this off. But remember to send the font with the file!
The whole Color section is voodoo to me. I go with:
--> Leave Color Unchanged
In general, when it comes to color management, if you don't know what
you're doing stay the hell away from it! To err is human, but to really
*things up requires CM.
--> Preserve Overprint Settings ON
Seems right to me. Don't know why. I leave the others off.
Ditto with the Advanced section. Voodoo. I check everything except
"Allow PostScript File To Override Job Options," which I turn off. Don't
really know why, except that it works for me.
I'm sorry, I've really typed quite a bit here, but if any PDFexperts are
still reading, I'd love to hear commentary on these settings.