Roman16
The Roman16 test images are a collection of images specifically photographed for testing colour management applications.
Lexicon
Softproof
A soft proof is – in contrast to the classic “Hard Proof” on paper – a proof, which is soley displayed on a monitor.
Spectral photometer
Spectral photometers (or spectrophotometers) are high-quality colorimeters that can measure and accurately describe any colour.
Spectrophotometer
Spectrophotometers are high-quality colorimeters that can measure and accurately describe any colour.
Spot Colour
Spot colours are inks that do not belong to the CMYK colour space, but are printed as a real colour in an additional inking. The most important representatives are PANTONE, HKS and TOYO colours.
sRGB
sRGB is the most widely used RGB colour space, and was created for monitors by Hewlett-Packard and Microsoft in 1996. sRGB is the standard colour space of all inexpensive digital cameras and scanners.
Standardized light
A standardized light is called a defined light condition under which the viewer can view and assess prints or objects uniformly. The most important standard illuminants D50 are in accordance with ISO 3664:2009 for printmaker and for colour matching in prepress and press (colour temperature: 5,000 kelvin) and D65 (colour temperature: 6500 K) for internet graphic designer. D65 is the default setting for most monitors.
SWOP
Specification for Web Offset Publications. Name of an organization and a collection of North American printing standards that define, among other things, the colour values of the primary colours cyan, magenta, yellow and black. They refer to the ISO standard, but are not identical. There are also SWOP specifications for proofing.
TL 84
Light of the neon fluorescent type F11 or TL84 is the classic neon light, the typical “department store lighting”. TL84 represents a three-band fluorescent lamp with 4000 Kelvin. This light is installed in many standard light boxes, to compare the reproduction of materials or surfaces with D50 or D65 standard light.
Tonal Value Increase
Dot gain or Tonal Value Increase is the difference between the halftone values in the original and the halftone values in print. This difference is caused by printing technology.
Transparent
Transparent printing inks that are not opaque are used in four-colour printing.
Special colours such as PANTONE are also usually transparent.
Trimbox
The Trimbox is the final format of a PDF file without bleed. For an A4, the Trimbox of the PDF is therefore 210x297mm, while the Bleedbox would be 216x303mm with 3mm bleed all around.
UCR
Under Color Removal or Under Color Reduction is used when separating LAB or RGB to CMYK. The goal of under color reduction is to reduce the CMY parts in black pixels in order to reduce the overall color coverage.
UGRA
Ugra is the Swiss Centre of Competence for Media and Printing Technology. The UGRA is particularly active in the areas of control agents and certifications.
Uncoated paper
Refers to all papers that have not been finished with a coating application.
Validation print
A Validation Print is a color-accurate print according to ISO 12647-8. The Validation Print has higher color tolerances than the contract proof according to ISO 12647-7 and, unlike the contract proof, is NOT color- and legally binding.
Water-absorbent
The technical term for this is hydrophilic (ancient Greek: hýdor “water”, phílos “loving”). Hydrophilic surfaces absorb water and can thus be wetted with water.
Water-repellent
The technical term for this is hydrophobic (ancient Greek: hýdor “water”, phóbos “fear”). Water rolls off hydrophobic materials without moistening them.