IEC 62899-302-4:2024

IEC 62899-302-4 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
Printed electronics –
Part 302-4: Equipment – Inkjet – Medium for inkjet printing dot placement
evaluation
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IEC 62899-302-4 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
Printed electronics –
Part 302-4: Equipment – Inkjet – Medium for inkjet printing dot placement

evaluation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 37.100.10 ISBN 978-2-8322-9495-6

– 2 – IEC 62899-302-4:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative reference . 6
3 Terms and definitions . 7
4 Parameters and measurement methods . 7
4.1 General . 7
4.2 Environmental conditions . 8
4.3 Parameters . 8
4.4 Measurement methods . 9
4.4.1 Size . 9
4.4.2 Thermal dependency . 9
4.4.3 Humidity dependency (hygroexpansivity) . 9
4.4.4 Thickness . 9
4.4.5 Flatness (curl) . 9
4.4.6 Smoothness (surface roughness) . 9
4.4.7 Liquid absorption capacity . 9
4.4.8 Surface wettability . 10
4.4.9 Roundness of dot mark (including after drying) . 10
4.4.10 Capability of having a dot mark for the transparent ink . 10
4.4.11 Stability of the dropped position, after printing and before measuring . 11
4.4.12 Other parameters of the medium: Coating . 11
5 Report . 12
Annex A (informative) Gravity centre . 13
Bibliography . 14

Figure 1 – Examples of a medium for actual dot placement . 6
Figure A.1 – Gravity centre . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PRINTED ELECTRONICS –
Part 302-4: Equipment – Inkjet –
Medium for inkjet printing dot placement evaluation

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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IEC 62899-302-4 has been prepared by IEC technical committee 119: Printed Electronics. It is
an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
119/496/FDIS 119/506/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

– 4 – IEC 62899-302-4:2024 © IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62899 series, published under the general title Printed electronics,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
Until recently, inkjet technologies were used only for imaging printing (conventional “graphic
printing”). However, recent developments of inkjet technologies, such as technologies for inkjet
print-head, functional ink or print-head driving technologies, make it possible to extend their
applications to printed electronics. For these applications, the accuracy requirement for inkjet
drop placement tends to be higher than in graphic printing.
This document considers that “'inkjet print dot placement accuracy” is the key parameter to
obtain an appropriate output that has adequate print quality. In order to evaluate the inkjet
printing system, inkjet print dot placement accuracy is measured. For that purpose, an
appropriate medium is used, since the “accuracy” of the printed position is only secured by
using an appropriate medium that shows actual dot placement. This document describes what
kinds of parameters of an appropriate medium are useful to obtain actual accuracy of dot
placement evaluation for printed electronics.

– 6 – IEC 62899-302-4:2024 © IEC 2024
PRINTED ELECTRONICS –
Part 302-4: Equipment – Inkjet –
Medium for inkjet printing dot placement evaluation

1 Scope
This part of IEC 62899 provides measurement methods and specifications for a medium to
measure actual inkjet dot placement for printed electronics applications.
NOTE For this document, a medium is a substrate with (a) certain functional layer(s) to facilitate the ink pinning
process (or step). These functional layers are either (a) a liquid absorbing layer or (b) a hydrophilic or hydrophobic
layer as shown in Figure 1.
a) Medium with a liquid absorbing layer b) Medium with a hydrophilic or hydrophobic layer

NOTE These figures are examples, and do not show all the required layers of a medium.
Figure 1 – Examples of a medium for actual dot placement
2 Normative reference
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
ISO 216, Writing paper and certain classes of printed matter – Trimmed sizes – A and B series,
and indication of machine direction
ISO 534, Paper and board – Determination of thickness, density and specific volume
ISO 4287, Geometrical Product Specifications (GPS) – Surface texture: Profile method – Terms,
definitions and surface texture parameters
ISO 8226-1, Paper and board – Measurement of hygroexpansivity – Part 1: Hygroexpansivity
up to a maximum relative humidity of 68 %
ISO 8226- 2, Paper and board – Measurement of hygroexpansivity – Part 2: Hygroexpansivity
up to a maximum relative humidity of 86 %
ISO 9513, Metallic materials – Calibration of extensometer systems used
...