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From: AES on 20 Jun 2010 14:19
In article <MPG.268556aadf1ad93f9897e4(a)usenet.plus.net>,
ken <ken(a)spamcop.net> wrote:

. . . an interesting and helpful reply to my original query about PDF
files (query and reply left appended below for anyone who may want them).

Thanks much for this.

The very different responses I get when I re-open in Illustrator the
same PDF file after Saving it from Illustrator with Illustrator editing
capabilities enabled, or not enabled, is consistent with your
explanation.




=================================================
ORIGINAL QUERY & REPLY
=================================================
> In article <siegman-4C557D.09540118062010(a)bmedcfsc-
> srv02.tufts.ad.tufts.edu>, siegman(a)stanford.edu says...
>
>
> > A single PDF with a few hundred characters of text and some vector
> > graphics (no jpegs or pixel graphics) may be only 30K in size if saved
> > from Illustrator as PDF with Illy editing capabilities turned off -- but
> > becomes 400K with the Preserve Illy editing capabilities left on.
>
> What actually happens here is that the Illustrator file is saved inside
> the PDF file. When you reopen it with Illustrator it actually opens the
> saved file inside the PDF file, it doesn't attempt to interpret the PDF
> file.
>
> So yes, the PDF file gets (a lot) bigger.
>
>
> > When I try to shrink one of these back down to 30K using PDF Shrink,
> > using the Remove metadata and "Foreign app" options in PDF Shrink, it
> > only shrinks to about 350K.
> >
> > Am I missing something In PDF Shrink (which I otherwise find very
> > useful? Can Graphic Converter do this job?
>
> I don't know of any tools that will do the job. The data is stored in
> 'application-spcific' sections of the file. Only the relevant
> application (usually the creator) knows what to do with these, so
> everything else leaves them alone. Though the 'foreign app' sounds like
> it ought to do that.
>
> Taking a quick peek it look slike PDF Shrink possibly interprets the PDF
> file and creates a new PDF from it. You could do the same with (for
> example) Ghostscript. Feed the original PDF as the input, create a new
> PDF (potentially with custom settings) and it will probably be OK.
>
> Its entirely possible to create something which would specifically strip
> out the Illustrator saved file, but I don't know of anything which does
> it.
>
> Of course, this is all without seeing the file, its possible there is
> something different about your files.
>
> Ken
From: steggy on 30 Jun 2010 17:55
AES schreef:
> Is there a way to remove the Illustrator editing capabilities stored
> within a PDF file that has been prepared in Illustrator and Saved As PDF
> with Preserve Illustrator editing capabilities turned on? (other than
> re-opening the file in Illustrator and re-Saving it)
>
> More detail:
>
> I like to make 1-page PDF documents (slides) in Illustrator CS; keep
> master copies with "Preserve Illustrator Editing Capabilities" turned
> on; then make dupes of selected files (in the Finder) to use when I'm
> putting together a presentation.
>


I followed this discussion and there is one thing I do not understand.

Why not save the Illy files like you did (with Preserve on) and save it
again (in another folder) with Preserve off? That is instead of making
dupes in Finder.
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