ISO 19302:2018 グラフィックテクノロジー—印刷ワークフローの色適合性 | ページ 6

3.1

actual printing condition

APC

printing condition of the actual printing device or printing process

3.2

colourant

physical substance such as ink or toner which is used alone or as part of a set of colourants in order to produce a colour

3.3

comp

mock-up

proof formed to the shape of the final product indicating whether or not it is colour accurate

3.4

device colour build

colour destined to be printed using a process colourant combination

Note 1 to entry: It is typically used to define device-specific values that allow reproduction of a colour using only process colourants.

3.5

preflight check

file inspection to determine that the digital data contained therein will process such that all data can be accurately imaged to an image carrier or substrate

3.6

print buyer

person or organization that prepares job data and files in order to deliver them to a print service provider

3.7

print service provider

person or company that receives job data and files for the purpose of printing them

3.8

printing condition

set of primary process parameters which describe the conditions associated with a specific printed output and define spectrally or colourimetrically aim values

Note 1 to entry: Such parameters include printing process, substrate, colourant, colourant sequence and screening. Aim values typically comprise colourants and tone reproduction curves description.

Note 2 to entry: For the purposes of colour management, a printing condition should be fully characterized by giving the relationship between process input values (as stipulated in ISO 12642-2 for CMYK) and the corresponding measured colourimetric values.

3.9

process colour

colour that is the outcome of a colour separation operation and that typically requires one or more printing units and process colourants to be reproduced

3.10

process colourant

colourant that is used to print process colours

3.11

reference printing condition

RPC

aim printing condition for the job

3.12

metameric index

difference between spectral radiance distributions within the visible spectrum for two specimens with identical tristimulus values for a given reference illuminant and reference observer

Note 1 to entry: The procedures concerned with a special metamerism index for a change from a reference illuminant to a test illuminant of different spectral composition, or that for a change from a reference observer to a test observer of different colour-matching functions, are called the determination of special metamerism indices.

Note 2 to entry: Requirements for metameric index are specified in CIE 15.

Note 3 to entry: A measure of metamerism for the two specimens is the colour difference between the two metameric specimens caused by substituting an illuminant, “special metamerism index: change in illuminant”, and caused by substituting an observer, “special metamerism index: change in observer”. The colour difference is evaluated using a CIE colour difference formula and it shall be clearly stated which formula has been used.

3.13

spot colour

colour typically used for the definition of brand colours or special design effects that is usually chosen with the intent of being printed using one printing unit and one spot colourant and that is usually not blended with other colourants

3.14

spot colourant

colourant that is primarily used to print a spot colour even if it can replace or be blended with process colourants to obtain a specific colour gamut or colour reproduction

3.15

substrate-corrected colourimetric aim

SCCA

colour data that are corrected in order to compensate for the colourimetric difference between reference substrate and production substrate colours, assuming that the primary difference between them lies in the colour of the substrates

3.16

system qualification

assessment operation used to qualify the ability of a print device or a printing process to reproduce a defined colour data set

Note 1 to entry: This qualification, also named “extended scrutiny”, cannot usually be performed by print providers during production as it requires specific testing conditions and protocols.