SIST ISO 2834-1:2008

SLOVENSKI STANDARD
SIST ISO 2834-1:2008
01-junij-2008
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SIST ISO 2834:2002
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Graphic technology – Laboratory preparation of test prints – Part 1: Paste inks in
Ta slovenski standard je istoveten z: ISO 2834-1:2006
ICS:
87.080 Barvila. Tiskarske barve Inks. Printing inks
SIST ISO 2834-1:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 2834-1:2008

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SIST ISO 2834-1:2008

INTERNATIONAL ISO
STANDARD 2834-1
First edition
2006-06-01

Graphic technology — Laboratory
preparation of test prints —
Part 1:
Paste inks
Technologie graphique — Préparation en laboratoire des impressions
d'essai —
Partie 1: Encres compactes




Reference number
ISO 2834-1:2006(E)
©
ISO 2006

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SIST ISO 2834-1:2008
ISO 2834-1:2006(E)
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ii © ISO 2006 – All rights reserved

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SIST ISO 2834-1:2008
ISO 2834-1:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 2834-1 was prepared by Technical Committee ISO/TC 130, Graphic technology.
This first edition of ISO 2834-1, together with ISO 2834-2 and ISO 2834-3, cancels and replaces
ISO 2834:1999. It also incorporates the Technical Corrigendum, ISO 2834:1999/Cor 1:2003. It is both a
revision and an expansion of ISO 2834:1999 which only was applicable to lithographic and letterpress inks.
The revised series of ISO 2834 makes provision for test print preparation for all ink types and this part of
ISO 2834 covers paste inks. In addition, this part of ISO 2834 was adapted to include a larger range of
commercially available ink printability testers.
ISO 2834 consists of the following parts, under the general title Graphic technology — Laboratory preparation
of test prints:
⎯ Part 1: Paste inks
⎯ Part 2: Liquid inks
⎯ Part 3: Screen inks


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SIST ISO 2834-1:2008
ISO 2834-1:2006(E)
Introduction
This part of ISO 2834 specifies the test print preparation for paste inks, i.e. lithographic and letterpress inks.
These test prints have a homogeneous distribution of ink on a specified substrate and a known ink coverage
and/or ink layer thickness. Therefore, they are suitable for optical tests so that the measured reflectance can
be assigned to a known ink layer thickness. If test prints are prepared only for mechanical and chemical
resistance tests, where the accuracy of the known ink layer thickness is different, it may be possible to apply
other less accurate methods, e.g. using coaters or drawdown bars.
The methods described in this part of ISO 2834 are used in other International Standards, e.g. ISO 2846-1,
ISO 2846-2 and ISO 2836.


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SIST ISO 2834-1:2008
INTERNATIONAL STANDARD ISO 2834-1:2006(E)

Graphic technology — Laboratory preparation of test prints —
Part 1:
Paste inks
1 Scope
This part of ISO 2834 specifies a laboratory method for the preparation of printed samples made with paste
inks (such as inks used for lithographic and letterpress printing). Such printed samples are intended to be
used for reflection based measurements, such as colorimetry and reflection density as well as for testing light
fastness, and the resistance of printing inks to mechanical and chemical attack regarding either printing ink
and/or substrate.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
printability tester
device for uniformly inking a printing forme and transferring a known amount of ink on a substrate under
specified conditions
2.2
printed area
area of a substrate that is printed on, given by the surface area of the printing forme
3 Test method
3.1 Principle
Using a printability tester, a known quantity of ink is printed uniformly on a known area of the paper or any
other chosen substrate. The ink coverage is expressed in grams per square metre or, taking into account the
mass density of the ink, by the ink layer thickness in micrometres.
For ease of operation, an ink pipette may be used for metering the amount of ink supplied to the inking unit.
The actual amount of ink transferred to the substrate is only determined by weighing the printing forme
immediately before and after printing.
Additional to printing, test samples for mechanical and chemical resistance tests may be prepared using any
technique resulting in a uniform ink film in a desired thickness range, for example using a hand roller, coater
or drawdown bar.
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SIST ISO 2834-1:2008
ISO 2834-1:2006(E)
3.2 Apparatus
3.2.1 Printability tester
The printability tester allows for the uniform inking of the printing forme and the uniform transfer of the ink to
the substrate at a constant speed and pressure.
3.2.2 Printing forme
The printing forme shall have either a smooth metallic and non-porous surface or shall be covered by an
elastomer or rubber blanket. The type of the printing forme shall be mentioned in the report.
3.2.3 Analytical balance
The analytical balance shall be accurate to 0,1 mg.
3.3 Materials
3.3.1 Printing ink
Printing inks for the preparation of test prints shall be ready for use.
3.3.2 Substrate
For the purpose of optical tests, the assessment of light fastness of an ink and any other test, there shall be
prior agreement as to the substrate to be used.
4 Procedure
4.1 Printing
4.1.1 Inking of the printing forme
An appropriate amount of ink shall be applied to the inking unit. Appropriate time for distribution on the inking
unit and inking of the printing forme shall be chosen to ensure a homogeneous distribution of the ink.
It is important to keep the distribution time and the inking time of the forme as short and as constant as
possible, preferably controlled by the inking unit itself. If the unit is not equipped with this facility, a separate
timer shall be used. Leaving the ink too long on the inking unit and/or running at high speed may change the
properties due to misting, drying and evaporation of solvents. Distribution and inking times are specified in
Annex A.
The inking time does not include the weighing time.
Solvent used to clean the printing forme and the ink distribution roller can penetrate into the coverage of the
rollers. Time needs to be allowed to ensure full evaporation of the solvent. Using two or more formes and
inking sections alternatively is recommended.
NOTE Several low inflammable, low odour and/or environment-friendly solvents leave an oily or greasy deposit on
the forme. This deposit can evaporate only after a long time or needs to be wiped off before using the forme to prevent the
next print from being influenced by residues of the solvent.
Evaporation of the solvents draw most of the energy required from the surface of the roller, therefore the
rollers may cool several degrees while drying. They should be allowed to reach temperature equilibrium again
before the next use, by letting them run dry on the inking unit or giving th
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