ISO 12634:1996

SLOVENSKI STANDARD
SIST ISO 12634:1997
01-junij-1997
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Graphic technology -- Determination of tack of paste inks and vehicles by a rotary
tackmeter
Technologie graphique -- Détermination de la consistance des encres et excipients
projetés, à l'aide d'un consistomètre rotatif
Ta slovenski standard je istoveten z: ISO 12634:1996
ICS:
87.080 Barvila. Tiskarske barve Inks. Printing inks
SIST ISO 12634:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 12634:1997

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SIST ISO 12634:1997
INTERNATIONAL IS0
STANDARD
12634
First edition
1996-l l-l 5
Graphic technology - Determination of
tack of paste inks and vehicles by a rotary
tackmeter
Technologie graphique - D&termination de la consktance des encres et
exclpien ts proje t&s, & /‘aide d ‘un consis tom& tre rota tif
Reference number
IS0 12634: 1996(E)

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SIST ISO 12634:1997
IS0 12634:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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.
International Standard IS0 12634 was prepared by Technical Committee
ISO/TC 130, Graphic technology.
0 IS0 1996
All rights reserved. Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or mechanical, including
photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST ISO 12634:1997
Q IS0 IS0 12634:1996(E)
Introduction
The tack value is a well-established criterion for assessing a paste ink or
vehicle, although the parameter tack is poorly defined. The tack cannot be
regarded as a material property that can be derived from basic physical
phenomena. However, the tack may predict in some cases the behaviour
of ink in a printing press.
Parameters that affect tack are:
- dimensions, hardness and elasticity parameters of elastomeric rollers;
- surface properties of rollers;
- nip pressure;
- roller speed;
- the temperature of rollers and environment;
the temperature of the sample;
-
- the ink film thickness;
- influence of the ink or vehicle on the properties of the elastomeric
rollers (e.g. absorption of solvents);
- the condition of the elastomeric rollers due to the cleaning process;
the condition of the elastomeric rollers due to long-term use;
-
- the properties of the test sample.
Respecting all differences, this International Standard is a guideline so that
users of comparable equipment obtain comparable results when working
under the same conditions. This International Standard cannot replace the
technical manuals.
. . .
III

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SIST ISO 12634:1997
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SIST ISO 12634:1997
IS0 12634: 1996(E)
INTERNATIONAL STANDARD @ IS0
Determination of tack of paste inks
Graphic technology -
and vehicles by a rotary tackmeter
1 Scope
This International Standard specifies the procedure for determining the tack value of paste inks and vehicles which
have low volatility and are unreactive under normal room conditions during the time span required for testing.
This International Standard contains a basic description of the rotary tackmeters most commonly used.
2 Definition
For the purposes of this International Standard, the following definition applies.
2.1 tack: Restoring force between two rotating rollers of a given width caused by the splitting of an ink or vehicle
film on the roller surfaces.
NOTES
1 Tack is a rheological parameter indicative of internal cohesion and other physical/chemical
...