ISO/TS 21328:2022 グラフィック技術 — マルチカラー (CMYKOGV) 印刷の特性評価に関するガイドラインと推奨事項 | ページ 6

3.1

calibration

comparison and adjustment between printing systems – one of known behaviour or correctness, made with a set of reference colours, and another printing system made to print in as similar a way as possible with the reference device

Note 1 to entry: The G7 methodology is one form of printing system calibration where the reference colours are 3-colour overprints made to match as closely as possible the optical properties of a series of black-only prints.

Note 2 to entry: ISO/PAS 15339-1 describes another process for calibration of a printing system to a Characterized Reference Printing Condition.

Note 3 to entry: Often, the first step alone in the above definition is perceived as being calibration.

3.2

colour characterization data

tabulation of data that represents the relationship between device code values (e.g. CMYK, CMYKOGV) and the colour (spectral and CIELAB values) produced on the printed sheet by those values in a specific printing process

Note 1 to entry: The colour characterization data may be used to create an ICC profile as in ISO 15076.

3.3

Colour eXchange Format

CxF/X

format for the communication of colour and process control data and the associated metadata for its proper interpretation detailed in ISO 17972-1

Note 1 to entry: For example, CxF/X-1 is used to communicate process colour information and other metadata related to the colour data including tone values, ink amounts and spectral data. CxF/X-4 files are used to communicate spot colour ink data that requires spectral data and transparency metadata.

3.4

hue angle

angular component of the polar representation of a colour based on CIELAB, calculated by h_ab = arctangent(b*/a*)

3.5

printing condition

set of primary process parameters that describe the conditions associated with a specific printed output and defined colourimetrical and/or densitometrical aim values

3.6

packaging

process of designing, evaluating, and producing packages

Note 1 to entry: For this document, use of the term specifically refers to the materials used to produce colour graphics and information displayed on the substrate.

Note 2 to entry: Methods for production may include direct printing, lamination, or labels.

3.7

primary process colour

colour that is the outcome of a colour separation process (typically CMYK)

Note 1 to entry: A process colour reproduction typically requires one or more printing units and process inks to be reproduced.

Note 2 to entry: The ink set is specified in the ISO 12647series.

Note 3 to entry: The colours OGV are typically added in MCPP.

3.8

characterized reference printing condition

CRPC

identified printing condition (3.11) and its colour characterization data used as the aim for a particular printing task (job)

Note 1 to entry: ISO/PAS 15339-1 provides 7 Characterized Reference Printing Conditions (CRPC).

3.9

spot colour tone value

SCTV

value that describes the apparent halftone area for a non-process ink as described in ISO 20654

3.10

multicolour process printing

MCPP

printing with more than a single colour ink with a multi-unit printing system

Note 1 to entry: It is also called expanded colour gamut printing where process colour printing uses more than 4 primary inks, for example orange, green, and violet inks, so as to increase the volume of colour space which can be reproduced using halftone combinations of the primary plus extra inks.

3.11

identified printing condition

printing condition documented in a national or international standard or industry publication in a way that allows it to be replicated by an industry practitioner. Also, a set of primary process parameters that describe the conditions associated with a specific printed output and defined colourimetrical and/or densitometrical aim values