Proofing.de | - Part 6

A B C D E F G H I J K L M N O P Q R S T U V W

IT8 Control Chart

The IT8-Chart is a defined measuring field table which is used to create ICC profiles. This table has been declared in ISO 12642.

JMPA, Japan Magazine Publishers Association (http://www.j-magazine.or.jp/index_e.html). There also exists the JPMA, Japan Printing Machinery Association (http://www.jpma-net.or.jp/en/), an association of manufacturers of printing presses and machines for the further processing.

Job ticket

Each colour and legally binding proof comes with a job ticket on which the most important frame data for the proof and data processing are listed. The job ticket is usually placed between the proof and the media wedge.

JPMA

Japan Printing Machinery Association (http://www.jpma-net.or.jp/en/), an association of manufacturers of printing presses and machines for the further processing. There also is the JMPA, Japan Magazine Publishers Association (http://www.j-magazine.or.jp/index_e.html)

Just

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

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.

Kodak Approval

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.

LAB

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.

Late binding

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.

Linen tester

A small magnifying glass in reproduction and printing technology with 8 to 10x magnification. Linen testers are often used in pre-press to check screens or register accuracy.

LWC paper

LWC paper (Light Weight Coated) is a light-weight, two-side coated web printing paper. Brochures and catalogues are often printed on this paper.

Mediabox

The Mediabox is the largest of the five box sizes of a PDF file. Other box sizes are: Cropbox, Bleedbox, Trimbox and Artbox.

Metamerism

The term metamerism is understood as the effect that two things may look the same under one light, but completely different under another light.

Moiré

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.

Monitor calibration

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.

multispectral

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

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.