paunang salita
ISO (International Organization para sa Standardisasyon) ay isang pandaigdigang alyansa ng mga pambansang pamantayan katawan (Mga katawan ng miyembro ng ISO). Ang pagbuo ng mga internasyonal na pamantayan ay karaniwang isinasagawa sa pamamagitan ng ISO teknikal na komite. Ang bawat institusyon ng miyembro na interesado sa isang paksa kung saan itinatag ang isang teknikal na komite ay may karapatang kumatawan sa komiteng iyon. Ang mga internasyonal na organisasyon ng pamahalaan at di pamahalaan na nakikipag ugnayan sa ISO ay kasangkot din sa gawaing ito. ISO ay gumagana nang malapit sa International Electrotechnical Commission (IEC) sa lahat ng bagay ng electrotechnical standardization.

International pamantayan ay drafted alinsunod sa mga patakaran na ibinigay sa Bahagi 2 ng Direktiba ng ISO / IEC.

Ang pangunahing gawain ng komite ng teknikal ay upang itakda ang mga internasyonal na pamantayan. Ang draft international standards na pinagtibay ng Technical Committee ay ipapakalat sa mga miyembro ng katawan para sa pagboto. Ang paglalathala bilang isang internasyonal na pamantayan ay nangangailangan ng pag apruba ng hindi bababa sa 75% ng mga katawan ng miyembro.

Mangyaring tandaan na ang ilang mga nilalaman ng dokumentong ito ay maaaring sumailalim sa mga karapatan sa patent. Ang ISO ay hindi mananagot para sa pagtukoy ng anuman o lahat ng naturang patente.

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

Ang ikalawang edisyon ay kinakansela at pinalitan ang unang edisyon (ISO 2846-2:2000), in which articles 4 at 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.

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

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

— Bahagi 2: cold-set offset lithography

— Bahagi 3: Intaglio printing of publications

— Bahagi 4: Screen printing

— Bahagi 5: Flexographic printing

ISO 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Bahagi 2: Cold-set offset lithography

ipakilala ang
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].

Ang bahaging ito ng ISO 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. Gayunpaman, the similarity of the two inks on the reference substrate will ensure the similarity on the other substrate.

1 saklaw
Ang bahaging ito ng ISO 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.

Ang bahaging ito ng ISO 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 Mga reperensyang normatibo
The following reference documents are not available or available for use in this document. Para sa mga petsang sanggunian, angkop ang mga bersyon na may pagbanggit lamang. Para sa mga walang petsang sanggunian, ang bagong bersyon ng sanggunian (kasama ang anumang mga rebisyon) angkop.

ISO 536, papel at pisara – Pagpapasiya ng gramo ng timbang

ISO 2471, Papel at pisara – Determination of opacity (paper backing) – diffuse reflection method

ISO 2834-1, Graphic techniques – Laboratory preparation of test prints – Bahagi 1: pasting inks

ISO 8791-4, papel at pisara – Determination of roughness/smoothness (air leakage method) – Bahagi 4: printing surf method

ISO 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

ISO 2846-2-2017 Printing technology – Colour and transparency of four-colour printing inks – Bahagi 2: Cold-set offset lithography

3 Mga Tuntunin at Kahulugan
Para sa mga layunin ng dokumentong ito, Ang mga sumusunod na termino at kahulugan ay nalalapat.

3.1 Cold set printing

Web offset printing without accelerated drying

Tala 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

Tala 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

Ang standard information section lamang ang pampubliko. Upang makita ang buong nilalaman, kailangan mong bilhin ang pamantayan sa pamamagitan ng mga opisyal na channel.