The portal for colour binding proofs, colour proofs, digital proofs, online proofs. Compact knowledge on colour management, graphics, measuring technology & more.
The Just Normlicht GmbH is the most famous manufacturer of standard lighting solutions in the printing sector. The company Just from the Swabian Weilheim / Teck sells alongside the classic D50 and D65 standard light tubes and various proof lights, stations and light booths, where prints can be checked under standardized lighting.
Kelvin is an absolute temperature unit, which is used in science.
The color temperature is in Kelvin of a light source, a monitor or an image corresponds to the temperature of a perfectly black object, that would glow at this temperature.
The Kodak Approval proofing system was introduced in the 90s by Kodak in the market. With a Kodak Approval system outstandingly accurate halftone proofs and production Dummies could be produced.
Due to the high cost of consumables (market prices for Kodak Approval proofs are up to 100 Euro / A3 sheet) and the long processing time in the proofer and the elaborate laminating of the the proofs, Kodak Approval system are now only rarely found in the market. They were replaced by the faster, cheaper and in the color rendering significantly better and more accurate inkjet proofing systems.
Kraftliner, also known as craft paper or kraft paper, is a particularly strong paper that plays an important role in the printing and packaging industry. The name ‘Kraft’ comes from the German word for ‘strength’, which describes the main property of this material well. It is mainly made from wood fibres, which are prepared in a special process known as the Kraft process. In this process, the wood chips are chemically treated to separate the cellulose fibres from the lignin. The result is long, resistant fibres that give the paper …
Kraft paper, also known as craft paper, kraftliner or craftliner, is a particularly strong paper that plays an important role in the printing and packaging industry. The name ‘Kraft’ comes from the German word for ‘strength’, which describes the main property of this material well. It is mainly made from wood fibres, which are prepared in a special process known as the Kraft process. In this process, the wood chips are chemically treated to separate the cellulose fibres from the lignin. The result is long, resistant fibres that give the …
CIELAB or LAB is a mathematical colour model that has become established wherever exact colour calculations are required. Computer colour management usually works via CIELAB.
The company Lacunasolutions from Kirchanschöring in Bavaria, owned by colour management expert Alexander Demmler, offers standard light solutions for printing companies and prepress operations, but also has a soft proofing solution in the form of the Spectraproof soft proofing software, which can produce excellent soft proofs using the company’s own standard light and various hardware-calibratable monitors such as EIZO, BENQ and Viewsonic. Standard light: From the small D50 standard light LED luminaire for the desk to large standard light installations in print shops, Alexander Demmler offers a wide range of …
In a “Late Binding” workflow, RGB image data is inserted into the layout during separation, and also embedded into the print PDF during PDF export to the print file. The conversion into the print colour space takes place at the last possible moment, e.g. in the RIP of the printing company.
An LED is a ‘light-emitting diode’ and in the graphics industry stands for the new ‘LED’ light, which has replaced older light sources such as neon tubes and tungsten lamps. Neon tubes are mainly known from the area of D50 or D65 standard light, while tungsten light sources were mainly used in colour measuring devices such as spectrophotometers and colourimeters. Today, LED light sources are predominantly used for both standard light and colour measurement light, as they can be better spectrally adapted and often emit a more harmonious light spectrum, …
A small magnifying glass in reproduction and printing technology with 8 to 10x magnification. Linen testers are often used in pre-press to check halftone or register accuracy.
LWC paper (Light Weight Coated) is a light-weight, two-side coated web printing paper. Brochures and catalogues are often printed on this paper.
A media wedge is a test pattern used in the printing industry and in colour management and consists of colour patches with defined colour values.
The Mediabox is the largest of the five box sizes of a PDF file. Other box sizes are: Cropbox, Bleedbox, Trimbox and Artbox.
The term metamerism is understood as the effect that two things may look the same under one light, but completely different under another light.
The Moiré effect or, in other words, a halftone overlay, is a common phenomenon when viewing prints. It occurs when two even patterns overlap unevenly.
In order to judge colours, the computer monitor must be calibrated. This ensures that colours and contrasts are displayed correctly on the screen.
A measuring device is recommended for this purpose, as monitor calibration with the eye is very error-prone.
The resulting calibration is stored as a monitor profile.
In order to describe colors accurately and avoid metamerism, modern color measurement is increasingly no longer carried out via colorimeter that can measure one color spot in the 3-dimensional colorspace LAB, but by spectral measurement, ie the recording of the complete emission spectrum or reflection spectrum of a color.
Munken papers are high quality uncoated papers by Arctic Papier, which are available in certain colours. Arctic has also created ICC profiles for this purpose, which take the particular properties of the papers into account. There are proof profiles available for some of these papers.
The company NEC is currently considered one of the most competent manufacturers of proof monitors. The NEC Spectraview series in particular offers sophisticated monitor technology and clever software solutions for high-quality colour processing.
OBA is the abbreviation for ” optical brightening agents” or “optical brighteners”.