ZePrA | Global Settings | Gradation

Gradations

Manage and create tone value correction curves

Overview

Almost every printing process requires a tone value increase (TVI) correction shortly before printing, which is stored in the RIP of the platesetter. This tone value correction is primarily used to maintain printing standards and to compensate for intangible data  in the printing process caused by a large number of factors, including the substrate and ink. These TVI corrections can be included in the data to be converted. Subsequently, only a linear conversion in the RIP software of the imagesetter is required for the exposure of the data.

By using gradation curves, tonal value corrections can be performed on process and spot colors. Gradation curves can be integrated into configurations and applied automatically, either after or instead of color conversion. The Gradations tool can be used to create the required gradation curves and then integrate them into Configurations (under Configurations in the Gradations tab).

Manage gradation curves

Create new gradation curves

In the Manage Gradation Curves window, create New curves and Duplicate or Delete existing ones. New curves can be modified in the Curve Design panel either by clicking and moving the displayed curve with the mouse pointer or by entering values. If you would like to enter percentage values in the Input and Output fields, first create an anchor point in the curve by clicking on the curve.

Creating a new curve

The entered values then refer to this anchor point. The X button is used to delete the selected anchor point.

Percentage values can be entered up to one digit after the decimal point. This allows for more precision of gradation corrections.

Note: The correction works most accurately with 16-bit data. For 8-bit data, the smallest change is 0.4 units (100/255=0.39), so corrections smaller than 0.4 cannot be applied.

ZePrA | Extract ICC Profile

Extract ICC Profile

Extracting ICC profiles from PDF/X files

Extracting ICC Profiles

The Extract ICC Profile tool extracts and saves profiles that are embedded in images or output intents of PDF/X files. Embedded profiles that do not exist separately as ICC profiles but are embedded in image or PDF files can be extracted and used, for example, This feature allows embedded profiles that are generally embedded in image and PDF files to be extracted and used, e.g., to create DeviceLink or SaveInk profiles.

Extracting an ICC profile

 

Procedure

  1. Click the Extract ICC Profile icon in the Sidebar.
  2. Select the File (PDF, JPEG, TIFF, PSB, or PSD) containing the embedded profile, or  drag-and-drop the file into the selection window.
  3. The embedded ICC Profile, the PDF/X Version, and the Output Condition are displayed. The embedded profile can be saved with Extract.