前言
国际标准化组织 (国际标准化组织) 是国家标准机构的全球联盟 (ISO成员机构). 国际标准的制定通常通过ISO技术委员会进行. 每个对已成立技术委员会的主题感兴趣的成员机构都有权在该委员会中派代表参加. 与 ISO 联络的国际政府和非政府组织也参与了这项工作. ISO 与国际电工委员会密切合作 (国际电工委员会) 关于电工标准化的所有问题.

用于开发本文件的程序以及用于进一步维护的程序在第 1 部分中进行了描述。 1 ISO/IEC 指令的. 尤其, 注意不同类型的 ISO 文件所需的不同批准标准. This document has been drafted in accordance with the editing rules in Part 2 ISO/IEC 指令的 (请参阅 iso.org/directives).

请注意，本文档的某些内容可能受专利权保护. ISO 不负责识别任何或所有此类专利. Details of any patent rights identified during the preparation of the document will be in the introduction and/or list of patent claims received by ISO (参见 iso.org/patents).

Any trade names used in this document are information provided for the convenience of the user and do not constitute an endorsement.

自主性, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (技术性贸易壁垒) 坚持世界贸易组织原则 (世贸组织) 信息, please refer to the iso.org/iso/foreword.html.

This document has been prepared by Technical Committee ISO/TC 6, 纸, Board and Pulp, 小组委员会SC 2, Test Methods and Quality Specifications for Paper and Board.

Any feedback or questions about this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ISO标准 19857-2021 “纸, 纸板和印刷油墨 – 设置胶印油墨适印性的实验室测试方法”

介绍
This document describes a test method for evaluating the ink setting characteristics of a specific ink/substrate combination in offset lithography.

Offset is the transfer of ink from the front of one piece of paper to the back or front of the next.

Solidification is the process by which low viscosity liquid ink components penetrate into a permeable substrate. These low viscosity liquids in inks are mineral oils, vegetable oils, or esters of vegetable oils. By separating from these low viscosity liquids, the remaining ink film solidifies. This is combined with changes in surface viscosity, depending on the ink-varnish system and time. Surface viscosity usually increases at the beginning of the setup and drops to zero later. The setting is the main drying mechanism of an ink system (例如. press inks) or part of a multi-channel drying mechanism (例如. traditional sheeting offset inks or thermosetting inks). The laboratory test used for setting up the interlining of the new print onto the non-printing substrate at a specified time. The transfer of ink to a non-printing substrate depends not only on the degree to which the ink solidifies through solidification, but also on the actual viscosity level of the original ink film. 所以, the test result is a combination measurement.

The absorptive properties of paper have great influence on offset lithography. Improper absorption can lead to many printing problems, such as ink offset, poor adhesion, mottling, unpredictable increase in tone value, poor friction resistance, and damage to the first printing surface on the perfect press after perfection.

The more absorbent the paper is, the less time it takes for the ink to set sufficiently for further processing, but rapid ink setting will adversely affect other properties. When testing the processing of wet sheets, very short periods of time should be used, for example in a perfect press. Longer times are used for paper processing after printing, while longer times are used for further processing, such as folding and cutting.

According to the test purpose, there are three options for paper and ink combination:

Producing reference ink on paper;

— production ink on reference paper;

– Production ink on paper, according to the application of printed matter, can be divided into the following types:

— face to face offset (例如. after folding offset);

Offset in front (例如, in a stack of paper).

ISO标准 19857-2021 “纸, 纸板和印刷油墨 – 设置胶印油墨适印性的实验室测试方法”

1 范围
This document describes a laboratory test method using an IGT1 or prufbau2 print-suitability tester for preparing samples to assess the absorption of ink on an offset substrate by setting a printed surface against an unprinted surface.

This method describes the use of ink volume to simulate monochromatic or multicolor printing. Printing and foil printing (counter printing) are done using intervals, between printing and counterprinting, that are common to the target process.

This method evaluates a specific ink and substrate combination.

2 规范性引用文件
文中引用下列文件，其部分或全部内容构成本文件的要求. 对于注明日期的参考文献, 仅引用版本适用. 对于未注明日期的参考文献, the latest version of the reference (包括任何修订) 适用.

国际标准化组织 5-4, Photographic and graphic techniques – Density measurement – 部分 4: Geometric conditions for reflection density

国际标准化组织 2834-1, Graphic techniques – Laboratory preparation of test prints – 部分 1: pasting inks

国际标准化组织 2846-1, Graphic technology – Colour and transparency of printing ink sets for four-colour printing – 部分 1: sheetrope and thermoset web offset lithography

3 术语和定义
就本文件而言, 以下术语和定义适用.

ISO 和 IEC 在以下地址维护标准化术语数据库:

– ISO在线浏览平台: iso.org/obp

— IEC电子百科全书: 可以在 electropedia.org/ 上找到

3.1 Ink Setting

The drying of ink by absorption and/or oxidation

3.2 Offset

The effect that occurs when ink on a print is transferred from a printed surface to another surface

3.3 Foil paper

Reverse paper

Paper used to make counter prints for offset (3.2) assessment

3.4 Ink Film

&其; On the substrate. The amount of ink applied to the substrate surface to obtain the print optical density required for this test

笔记 1: Quantities are specified in units of g/m2 or μm.

3.5 Ink Film

&其; On the printing mould. The amount of ink applied to the surface of the printing press to transfer to the substrate during the printing operation

笔记 1: Quantities are specified in units of g/m2 or μm. The amount of ink film applied to the inking system is usually about twice the amount transferred to the substrate.

仅标准信息部分是公开的. 查看完整内容, 需要通过官方渠道购买标准.