[pdftex] Colour profiles and pdftex
john at wexfordpress.com
Sun Sep 6 20:15:37 CEST 2009
On Sunday 06 September 2009 08:04:03 George N. White III wrote:
> On Sat, Sep 5, 2009 at 6:09 AM, André
Bellaïche<abellaic at math.jussieu.fr> wrote:
> > Hello,
> > I have gone into many troubles with a printing house recently
> > colour profiles or workspaces of included illustrations. The
> > complained very much about colour profiles for image files
> > the pdf file, although the book was in black, and all the
> > had been converted to black and white or gray level.
> Grays can be very difficult to get right. If you have images such
> photographs where certain details need to be visible in
> of) print versions, then you need either a very cooperative
> (almost impossible to find) or you have to take full advantage
> the prepress tools for color management.
> > These profiles or workspaces have names as Fogra 27 or Dot
> > I know nothing about the subject, and could hardly find
> > it on the Web, or in the books about Illustrator and Photoshop
> > find in bookshops. So, these are my questions.
> > 1) Where can I find both general and precise information
> > subject (books or url's)?
> Standards such as PDF/X are designed to make prepress more
> reliable in automated workflows.
> americanprinter.com: tends to be wieghted towards product
> contains useful information and is read by print shop staff.
> wikipedia.com: PDF/X, "ICC profile"
> Google: site:adobe.com PDF/X "ICC profile"
> Book: "Exploring Digital PrePress: The Art and Technology of
> Electronic Files for Printing" by
> Reid Anderson
> > 2) Is there a default profile included by pdftex in the files it
> > produces? What does pdftex do with the profile of included
> > can be of various sources: Adobe Illustrator, Photoshop,
> > Geoplan... ?
> No. In N. America many shops assume SRGB if no profile is
> Many LCD displays have an SRGB setting that is adequate for
> tasks, but for careful work factors such as age and ambient
> affect colors. You will have to save the illustrations using a tool
> supports the appropriate PDF/X standard.
> See <http://www.tug.org/pipermail/pdftex/2003-
> for an example. You can use Adobe Apps to create PDF/X.
> use of color is very simple, you should invest in a colorimeter
> Pantone Huey, which will help to ensure that the printshop sees
> colors you do.
> > 3) Is there a way to change the default output profile of
pdftex to get
> > more bold printing when one uses the Knuth Computer
Modern fonts, which
> > prints much to pale in most cases?
> No. The fonts were designed that way, but some print shops
> with the thin lines (dropouts). There are other fonts that may
> suited to a particular document, but the choice is limited if you
> maths. There are some documents on CTAN that compare the
options for maths
> using Type 1 fonts.
> > André Bellaďche
> These days, print shops expect authors to do much more of the
work. It is
> difficult to achieve top quality using only free tools. Most
> used to working with documents created using Adobe tools, so
> generally a good idea to save all the illustrations with the
> Adobe tool.
Just FYI: For book covers the printer LSI wants PDF X/1a:2001 plus
ink coverage no greater than 260% (The usual max is 300%)
Their tech told me that X/3 (popular in Europe) will mess up their
work flow. LSI is the only economic avenue to Amazon, the
dominant on line book seller. Therefore small and self publishers
are pretty much tied to that very restrictive standard.
"Create Book Covers with Scribus"
More information about the pdftex