SIST ISO 2846-2:2008 PDF

Name: SIST ISO 2846-2:2008 — Graphic technology - Colour and transparency of printing ink sets for four-colour printing - Part 2: Coldset offset lithographic printing
SKU: SIST ISO 2846-2:2008
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Graphic technology - Colour and transparency of printing ink sets for four-colour printing - Part 2: Coldset offset lithographic printing

Название (английский):

SIST ISO 2846-2:2008

Graphic technology - Colour and transparency of printing ink sets for four-colour printing - Part 2: Coldset offset lithographic printing

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 17 апреля 2008 г.
Издание:: ISO 2846-2:2007
ICS:: 17.180.20

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Описание (английский):

ISO 2846-2:2007 specifies the colour and transparency to be produced by inks intended for four-colour coldset web offset printing when printed under specified conditions on a printability tester. It also describes the test method to ensure conformance. ISO 2846-2:2007 is not applicable to fluorescent inks and does not specify pigments (or spectral reflectance) so as not to preclude the use of suitable future pigment combinations and still claim compliance with its colorimetric requirements.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 2846-2:2007 - Graphic technology - Colour and transparency of printing ink sets for four‑colour printing - Part 2: Coldset offset lithographic printing defines the colourimetric and transparency requirements for printing ink sets used in four‑colour coldset web offset processes. The standard specifies how inks should be tested (using a printability tester and a defined reference substrate) and describes the colour measurement and transparency test methods to ensure conformance. It excludes fluorescent inks and does not mandate specific pigments, allowing future pigment technologies while maintaining colorimetric aims.

Key topics and technical requirements

Scope: Color and transparency expectations for CMYK inks when printed under specified laboratory conditions for coldset offset.

Colorimetric targets: The standard provides CIELAB target values and tolerances for Yellow, Magenta, Cyan and Black (measured under specified conditions). These targets establish a repeatable colour aim for process inks.

Transparency limits: Transparency is quantified by a regression‑based measurement value T; minimum thresholds are specified: Yellow T ≥ 0.1, Magenta T ≥ 0.2, Cyan T ≥ 0.3. Highly transparent inks (especially cyan) that give near‑zero or negative slopes are treated as meeting the specification.

Ink film thickness range: Standard conformity is evaluated within a specified ink film thickness range of 0.7 µm to 1.3 µm.

Test method & measurement:

Prints are produced on a reference substrate (defined colour, grammage ~48.8 g/m², opacity >94%, roughness ~3.4 µm).
Colour is measured spectrally according to ISO 13655 (0°:45° or 45°:0° geometry, CIE 1931 2° observer, illuminant D50) using white backing per ANSI/CGATS.5:2003.
Transparency is assessed by overprinting primaries on a black substrate and calculating the slope of colour difference vs. film thickness.

Test preparation: Samples are conditioned (e.g., 12 h setting) and measured after printing on a printability tester per ISO 2834‑1.

Practical applications and users

Who benefits:

Ink manufacturers - certify that CMYK ink sets meet coldset colour/transparency aims.

Newspaper and publication printers using coldset web offset - ensure predictable colour reproduction across suppliers.

Color management and QA labs - perform verification testing and batch acceptance.

Prepress and process control engineers - base separations and tone value targets on standardized ink aims.

Practical uses:

Supplier qualification, incoming ink acceptance, process control, and cross‑vendor colour consistency for four‑colour coldset printing.

Related standards

ISO 2846‑1, 3, 4, 5 (other printing processes)

ISO 12647‑3 (process control for coldset)

ISO 13655 (spectral measurement)

ISO 2834‑1 (test print preparation)

ANSI/CGATS.5:2003, ISO 536, ISO 2471, ISO 8791‑4

Keywords: ISO 2846-2:2007, coldset offset lithographic printing, four‑colour printing, printing ink sets, colour and transparency, CIELAB, ink film thickness, reference substrate, printability tester.

SIST ISO 2846-2:2008 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 2846-2:2007

Graphic technology — Colour and transparency of printing ink sets for four-colour printing — Part 2: Coldset…

BS ISO 13655:2017

Graphic technology. Spectral measurement and colorimetric computation for graphic arts images.

BS ISO 2834-1:2020

Graphic technology. Laboratory preparation of test prints. Paste inks.

SIST ISO 2846-1:2018

Graphic technology - Colour and transparency of printing ink sets for four-colour printing - Part 1: Sheet-fe…

SIST ISO 12647-3:2014

Graphic technology - Process control for the production of half-tone colour separations, proofs and productio…

SIST EN ISO 5361:2023/A1:2026

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BS ISO 2471:2008

Paper and board. Determination of opacity (paper backing). Diffuse reflectance method.

ISO 8791-4:1992

Paper and board — Determination of roughness/smoothness (air leak methods) — Part 4: Print-surf method