What’s the difference
between PDF/X-1a and PDF/X-4?

Martin Bailey, CTO of Global Graphics and longtime U.K.  representative to the ISO PDF/X committee, has published an article about the difference between PDF/X-1a and PDF/X-4.

In particular, he discusses the question of responsibility for color. With PDF/X-1a, the creator is responsible for the correct colors. With PDF/X-4, the responsibility lies with the prepress specialists.

Two blog articles about raster
technologies from Global Graphics

Global Graphics has published two basic articles on modern raster technologies in its blog:

How quick is pdfToolbox’s
QuickCheck functionality?

A couple of weeks ago my colleagues at AgileStreams in France have been working on the question How long will it take to preflight a PDF file?

Now Callas has published more details in the Blog post How quick is pdfToolbox’s QuickCheck functionality?

ClockThe article explains the principle of the relatively new QuickCheck function and explains which properties of a PDF file can be checked with QuickCheck and which cannot (at present).

Second edition of «Do PDF/VT Right»
from Global Graphics

Global Graphics has updated their popular «Do PDF/VT Right™» guide.

The english publication offers a good overview on PDF/VT and tells what is necessary for an efficent use of this standard.

In addition to a general overhaul there is a section on the new ISO 21812 standard that allows workflow controls to be added to PDF files.

The new edition also contains notes on Harlequin-specific hints, to get even more speed out of your DFE if you are a Harlequin user.