предговор
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електротехничке стандардизације.

Међународни стандарди се израђују у складу са правилима датим у ч 2 ИСО/ИЕЦ директиве.

The main task of the technical committee is to set international standards. The draft international standards adopted by the Technical Committee will be circulated to member bodies for voting. Објављивање као међународни стандард захтева одобрење најмање од стране 75% of member bodies.

Please note that certain contents of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената.

ИСО 2846-2 was developed by the Technical Committee ISO/TC 130, Graphic Technology.

The second edition cancels and replaces the first edition (ИСО 2846-2:2000), in which articles 4 и 5 have been technically revised and the colorimetric characteristics of inks have been adjusted to meet actual commercial requirements and process standard ISO 12647-3[1]. The test print readiness details specified in ISO 2834-1 have now been removed.

ИСО 2846 consists of the following sections under the general heading Graphics Technology – Color and Transparency of printing ink sets for four-colour printing:

— Парт 1: Sheet-fed and heat-set web offset lithography

— Парт 2: cold-set offset lithography

— Парт 3: Intaglio printing of publications

— Парт 4: Screen printing

— Парт 5: Flexographic printing

ИСО 2846-2-2017 Технологија штампе – Боја и провидност четворобојних штампарских боја – Парт 2: Хладно постављена офсет литографија

увести
The first draft of ISO 2846-2 was written by ISO/TC 130 for material and process control. They examined the colorimetric properties of commercial cold-set web offset inks from around the world and found a set of color coordinates that adequately represented these color coordinates within reasonable tolerances. Since this part of ISO 2846 was first published, additional coordination between the various national agencies involved in ISO/TC 130 has shown that minor improvements to the contrasting color target will bring it more in line with the actual commercial printing requirements and process standard ISO 12647-3 [1].

Овај део ИСО-а 2846 will allow printers to obtain sets of printing inks from a variety of sources that will produce similar colours when printed on a reference substrate at the appropriate film thickness. This will allow color separation of cold-set offset printing based on known color standards. The colorimetric properties specified in this part of ISO 2846 can only be obtained when the ink is printed on a reference substrate. Међутим, the similarity of the two inks on the reference substrate will ensure the similarity on the other substrate.

1 домет
Овај део ИСО-а 2846 specifies the color and transparency of inks used for four-color cold-set web offset printing when printed on a printability tester under specified conditions. It also describes testing methods to ensure consistency.

Овај део ИСО-а 2846 does not apply to fluorescent inks and does not specify pigments (or spectral reflectance) so as not to rule out future use of suitable pigment combinations and still claim to meet its colorimetric requirements.

2 Normative references
The following reference documents are not available or available for use in this document. За датиране референце, citation-only versions apply. For undated references, the new version of the reference (укључујући све ревизије) примењује.

ИСО 536, папир и картон – Determination of gram weight

ИСО 2471, Папир и картон – Determination of opacity (paper backing) – diffuse reflection method

ИСО 2834-1, Graphic techniques – Laboratory preparation of test prints – Парт 1: pasting inks

ИСО 8791-4, папир и картон – Determination of roughness/smoothness (air leakage method) – Парт 4: printing surf method

ИСО 13655, Graphic Techniques – Spectral measurement and chrominance calculation of graphic art images

ANSI/CGATS. 5:2003, Graphic Techniques — Spectral measurement and chrominance calculation of graphic art images

ИСО 2846-2-2017 Технологија штампе – Боја и провидност четворобојних штампарских боја – Парт 2: Хладно постављена офсет литографија

3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Cold set printing

Web offset printing without accelerated drying

Белешка 1: The ink set is absorbed into the substrate.

3.2 Standard Ink

Inks for four-colour printing, printed on a reference substrate and printed within the applicable ink film thickness range, comply with the colorimetric and transparency specifications in this part of ISO 2846

3.3 Primary Color

The color of individual prints with yellow, magenta, and cyan inks

Белешка 1 Prints are standard primary colors if they are produced in accordance with this part of ISO 2846 and conform to specified colorimetric characteristics.

3.4 Transparency

The ability of an ink film to transmit light is usually expressed as some measure of unwanted scattering

3.5 Transparency measurement T

The reciprocal of the slope of the regression line between the film thickness and the color difference of the color ink overprint on black

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.