ZePrA 7 with PDF 2.0
and Processing Steps

ColorLogic has released Color Server ZePrA 7. The new version features many interesting enhancements:

  • Support for non-printing elements (ISO processing steps) and PDF layers.
  • Preservation and color conversion of Photoshop PSD and TIFF layers.
  • New feature Restore Configuration allows to re-run Jobs.
  • PDF 2.0 support (page based output intent, black point compensation on object level, spectral definition of spot colors (CxF)).
  • Improved and extended spot color module.
  • Many new productivity features.

However, a bug was already detected in the new version: DeviceLinks from the DLS Manager are not visible in ZePrA 7. An update will certainly soon become available…


Better organization
using preflight libraries

Four Pees, the international distributor of Callas products, has published a video about the benefits of libraries in Callas pdfToolbox with useful tips for optimal organization of these libraries.

Since the April 2017 update of Acrobat Pro DC, these libraries are also available in the preflight feature of Acrobat (developed by Callas). Therefore, (most of) the tips in this video are also useful for Acrobat users:


The first issue of PDF-AKTUELL
was published 20 years ago

The first issue of my newsletter PDF-AKTUELL: was published on February 9th, 1999:

At the beginning the newsletter was only published in german language. An english version was introduced in 2015.

The newsletter is published since 20 years more or less on a regular basis and contains information on the most important news about the use of PDF in prepress.

The newsletter archive is an interesting timeline about the development of this topic almost from the beginning.

Many external links in older issues are not working anymore since these pages have been moved or removed by their creators.

In the first years only a text email with the editorial, the titles of the messages and a link to an HTML page with the individual messages was sent. After the change of the website there is now an HTML-Email with all messages including pictures. For long posts only the beginning of the article and a link to the continuation will be published.


Understanding Overprint

In the Callas blog an article entitled Understanding Overprint was published:

The overprint function originates from the PostScript world of the last millennium. This has allowed to overrule a fundamental principle of the PostScript graphic model. In PostScript, normally only the topmost object is visible. All underlying objects are completely omitted by the top object (in all separations). This often leads to so-called “white gaps” (white edges around objects) when registration problems occur in multicolor offset printing machines. To solve this problem, the old litho trick of overprinting was introduced in PostScript Level 2. This is often used, for example, to avoid white gaps with black text placed over a colored background.

The overprint functionality of PostScript has been adopted unchanged in PDF. Today in PDF, the same effect could be achieved with transparency. This would avoid some problems (e.g. screen display) with the (obsolete) overprint function.

In his blog article Dietrich von Seggern describes in detail how the overprint function and the special overprint mode (introduced in PostScript 3) work in PDF.


Acrobat DC:
The Creative’s New Best Friend

There is a new post called Acrobat DC: The Creative’s New Best Friend in the Adobe blog. It’s all about the new features in Acrobat DC 2019 which allow a digital collaboration workflow with colleagues and customers. This is supported by the new possibility to import PDF annotations into an InDesign document.

The post is based on an interesting (and entertaining) tutorial by Patti Sokol, Senior Solutions Consultant at Adobe, and Keith Gilbert, Gilbert Consulting, with the title Getting Sh*t Done (GSD) with Acrobat DC (70 minutes) at Adobe MAX 2018:

In this tutorial they demonstrate who everybody without Acrobat/Reader and without signing into Document Cloud can add annotations to a PDF by just using a web browser.