Magnetic tape sound recording and reproducing systems - Part 4: Mechanical magnetic tape properties

Applies to non-perforated magnetic tape used for professional and domestic analogue sound recording and reproduction. Lists and defines the methods of measurement and equipment necessary to determine the mechanical characteristics of magnetic recording tape. Will also enable users of magnetic tapes to compare technical product data of different manufacturers, produced in accordance with this standard.

Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband - Teil 4: Mechanische Eigenschaften von Magnetbändern

Systèmes d'enregistrement et de lecture du son sur bandes magnétiques - Partie 4: Propriétés mécaniques des bandes magnétiques

S'applique aux bandes magnétiques non perforées à usages professionnels et domestiques pour l'enregistrement analogique et la lecture du son. Etablit la liste et définit les méthodes de mesure et l'équipement nécessaire pour déterminer les caractéristiques mécaniques des bandes magnétiques d'enregistrement. Permet à l'utilisateur de bandes magnétiques de comparer les spécifications techniques des produits de divers fabricants, établies conformément à cette norme.

Magnetic tape sound recording and reproducing systems -- Part 4: Mechanical magnetic tape properties ((IEC 60094-4:1986)

General Information

Status
Published
Publication Date
23-May-1994
Current Stage
6060 - Document made available
Due Date
24-May-1994
Completion Date
24-May-1994

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SLOVENSKI STANDARD
SIST EN 60094-4:1999
01-april-1999
Magnetic tape sound recording and reproducing systems -- Part 4: Mechanical
magnetic tape properties ((IEC 60094-4:1986)

Magnetic tape sound recording and reproducing systems -- Part 4: Mechanical magnetic

tape properties

Systeme für Tonaufzeichnung und -wiedergabe auf Magnetband -- Teil 4: Mechanische

Eigenschaften von Magnetbändern

Systèmes d'enregistrement et de lecture du son sur bandes magnétiques -- Partie 4:

Propriétés mécaniques des bandes magnétiques
Ta slovenski standard je istoveten z: EN 60094-4:1994
ICS:
33.160.30 Avdio sistemi Audio systems
SIST EN 60094-4:1999 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60094-4:1999
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SIST EN 60094-4:1999
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SIST EN 60094-4:1999
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SIST EN 60094-4:1999
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SIST EN 60094-4:1999
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SIST EN 60094-4:1999
NORME CEI
INTERNATIONALE IEC
94-4
INTERNATIONAL
Première édition
STAN DARD
First edition
1986-09
Systèmes d'enregistrement et de lecture du son
sur bandes magnétiques —
Quatrième partie:
Propriétés mécaniques des bandes magnétiques
Magnetic tape sound recording and reproducing
systems —
Part 4:
Mechanical magnetic tape properties
© IEC 1986 Droits de reproduction réservés — Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in

utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,

procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in

copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.

International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
IEC MeninyHapoxmaH 3rleKTpoTexHH4ecKaR HOMHCCHR
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue
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SIST EN 60094-4:1999
94-4 © I E C 1986 – 3 –
CONTENTS
Page
FOREWORD
PREFACE
Clause
1. Scope 9
2. Object 9
Standard atmospheric conditions for testing 9
4. Information to be supplied by the magnetic tape manufacturer 9
4.1 Recommended form for published data 9
5. Parameters to be measured 11
5.1 Tape width 11
5.2 Tape thickness 11
5.3 Static longitudinal curvature 13
5.4 Transverse cupping 15
5.5 Wavy edge 15
5.6 Longitudinal coiling 17
5.7 Electrical resistance of magnetic and back coating(s) 19
5.8 Layer-to-layer adhesion 19
5.9 Light transmittance 19
5.10 Tensile tests 19
5.11 Residual elongation 21
FIGURE 1 17
FIGURES 2 TO 6 22
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SIST EN 60094-4:1999
94-4 © I E C 1986 — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
MAGNETIC TAPE SOUND RECORDING AND REPRODUCING
SYSTEMS
Part 4: Mechanical magnetic tape properties
FOREWORD

1) The formal decisions or agreements of the I E C on technical matters, prepared by Technical Committees on which all the

National Committees having a special interest therein are represented, express, as nearly as possible, an international

consensus of opinion on the subjects dealt with.

2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense.

3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt the text

of the I

E C recommendation for their national rules in so far as national conditions will permit. Any divergence between the

I E C recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.

4) The I E C has not laid down any procedure concerning marking as an indication of approval and has no responsibility when an

item of equipment is declared to comply with one of its recommendations.
PREFACE

This standard has been prepared by Sub-Committee 60A : Sound Recording, of I E C Technical Committee No. 60 : Recording.

This standard should be read in conjunction with I E C Publication 38 (1983) : I E C Standard Voltages, I E C Publication 65

(1985): Safety Requirements for Mains Operated Electronic and Related Apparatus for Household and Similar General Use,

I E C Publication 268-1 (1985) : Sound System Equipment, Part 1: General, I E C Publication 268-3 (1969) : Sound System

Equipment, Part 3 : Sound System Amplifiers, E C Publication 386 (1972) : Method of Measurement of Speed Fluctuations in

Sound Recording and Reproducing Equipment, I E C Publication 651 (1979) : Sound Level Meters, ISO Recommendation R527

(1966): Plastics – Determination of Tensile Properties, and ISO Standard 4057 (1979): Information Processing – Data

Interchange on 6.30 mm (0.25 in) Magnetic Tape Cartridge, 63 bpmm (1600 bpi) Phase-encoded.

The text of this standard is based on the following documents:
Six Months' Rule Report on Voting
60A(CO)78 60A(CO)90

Further information can be found in the Report on Voting indicated in the table above.

I E C Publication 94 and its supplements are under revision. The new I E C Publication 94 will be issued in several parts, of

which this is Part 4.
It will have the following parts:
Part 1: General conditions and requirements

General: electrical requirements for the magnetic tape recording and reproducing systems; mechanical requirements for

the magnetic tape; tape identification; programme identification (Fourth edition, 1981).

Part 2: Calibration tapes

Minimum requirements for calibration tapes for making adjustments and comparative assessments of the reproducing

performance (First edition, 1975).

Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape (First edition,

1979).
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SIST EN 60094-4:1999
94-4 © I E C 1986 — 7
Part 4: Mechanical magnetic tape properties

Characteristics to be specified and relevant methods of measurement. Equipment to be used to determine the mechanical

properties of magnetic tapes (object of this standard).
Part 5: Electrical magnetic tape properties

Characteristics to be specified, methods of measurement and equipment to be used for the determination of the electrical

properties of magnetic tape for analogue sound recording and reproduction (in preparation).

Part 6: Reel-to-reel systems

Mechanical requirements and dimensions, including reels, hubs and relevant track allocations (First edition, 1985).

Part 7: Cassette for commercial tape records and domestic use

Mechanical requirements and dimensions, including track allocation (First edition, 1986).

Part 8: Eight-track magnetic tape cartridge for commercial tape records and domestic use

Mechanical requirements and dimensions, including track allocation (in preparation).

Part 9: Magnetic tape cartridge for professional use

Mechanical requirements and dimensions, including track allocation (in preparation).

Part 10: Time and address codes (in preparation).
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SIST EN 60094-4:1999
94-4 © I E C 1986 – 9 –
MAGNETIC TAPE SOUND RECORDING AND REPRODUCING
SYSTEMS
Part 4: Mechanical magnetic tape properties
Scope

This standard applies to non-perforated magnetic tape used for professional and domestic

analogue sound recording and reproduction.
2. Object

The object of this standard is to list and define the methods of measurement and equipment

necessary to determine the mechanical characteristics of magnetic recording tape. It will also

enable users of magnetic tapes to compare technical product data of different manufacturers,

produced in accordance with this standard.
3. Standard atmospheric conditions for testing
Ambient temperature : 20 ± 5 °C
Relative humidity : 60 ± 15

The sample roll of tape shall be incubated for 24 h at the stated conditions before the test is

commenced.
Information to be supplied by the magnetic tape manufacturer

Information supplied by the manufacturer shall fall into two distinct categories :

mandatory information to be clearly shown in the presentation of technical data, indicated by

the word "mandatory" on the right-hand side of the page, in this standard;

b) optional information which may be given at the discretion of the manufacturer, indicated by

the word "optional" on the right-hand side of the page, in this standard.
4.1
Recommended form for published data

Where data obtained in accordance with this standard or with any other I E C publication form

part of publicity material, they should be clearly set apart and should be preceded by the following

particulars :
the number of the appropriate I E C publication ;
ii) maker's name or trade mark ;
iii) maker's type reference and/or description ;
iv) base material (a generic name is sufficient).
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SIST EN 60094-4:1999
94-4 © I E C 1986 – 11 –
5. Parameters to be measured
(mandatory)
5.1 Tape width
Definition
The tape width is the perpendicular distance between its longitudinal edges.
Method

The width of the tape, covered with a glass, is measured without tension at a minimum of five

different positions along the tape using a calibrated microscope or profile projector having an

accuracy of at least 2.5 µ.m.
Result

The tape width is the arithmetical average of the five measurements, and is expressed in

millimetres.
5.2 Tape thickness
(mandatory)
Total tape thickness
5.2.1
Definition

The total tape thickness is the overall thickness of the tape, and is composed of base thickness,

magnetic coating thickness and back coating thickness (if any).
Method

The total tape thickness shall be measured by means of a micrometer having an accuracy of

at least 0.5 µm.

Ten measurements shall be made at intervals of approximately 1 m along the tape length.

Result
d. is

The total tape thickness is the arithmetical average of the ten measurement results, an

expressed in micrometres.
(optional) 5.2.2 Magnetic coating thickness
Definition

The magnetic coating thickness is the total thickness of the magnetic layer(s) of a tape.

Method

The magnetic layer(s) shall be removed with a suitable solvent, and the remaining tape

thickness measured using a micrometer having an accuracy of at least 0.5 µm.

Ten measurements shall be made at intervals of approximately 1 m along the tape length.

Result

The magnetic coating thickness is calculated from the difference between the total tape

thickness (Sub-clause 5.2.1) and the arithmetical average of the ten measurement results obtained

from this Sub-clause 5.2.2. It is expressed in micrometres.
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SIST EN 60094-4:1999
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94-4 © I E C 1986
(optional)
5.2.3 Back coating thickness
Definition

The back coating thickness is the total thickness of any coating applied to the tape side opposite

to that
...

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