Media wedge
The Ugra / Fogra media wedge is a file with defined color values that is incorporated into test prints so that it can be measured whether the print or the proof was carried out according to standards (according to ISO 12647 ). It is part of the print media standard . A media wedge is an arrangement of fixed, replicable specifications for calibrating an output device. Certain characteristics for the assessment are determined from the replication (visually as well as by measurement) and compared with the default characteristics. This deviation can then be used to adjust the output device in order to obtain smaller deviations.
Media wedges that are used for different application and evaluation criteria
Digital printing plate wedge
- Information field
- Resolution field
- Line fields
- Checkerboard squares
- Visual Reference Levels (VRS)
- Grid wedge
Ugra offset test wedge 1982 ©
- Exposure time
- Exposure latitude
- resolution
- gradation
- Dot rendering
PostScript control wedge
Ugra / Fogra media wedge CMYK V3.0
- Checking the color range and color fidelity (see Fig. Color space analysis)