ISO 4330:1994

Photography — Determination of the curl of photographic film and paper

Photographie — Détermination de l'incurvation des films et papiers photographiques

Photography - Determination of the curl of photographic film and paper

General Information

• Status: Withdrawn
• Publication Date: 21-Dec-1994
• Withdrawal Date: 21-Dec-1994
• ICS: 37.040.20 - Photographic paper, films and plates. Cartridges
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42/WG 5 - Physical properties and image permanence of photographic materials
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 11-May-2000
• Ref Project: SIST ISO 4330:1997 - Photography -- Determination of the curl of photographic film and paper

Relations

• Revised: ISO 18910:2000 - Imaging materials — Photographic film and paper —- Determination of curl
• Effective Date: 15-Apr-2008
• Revises: ISO 4330:1987 - Photography — Determination of the curl of photographic film
• Effective Date: 15-Apr-2008
• Revises: ISO 4330:1979 - Photography — Determination of the curl of photographic film
• Effective Date: 15-Apr-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ISO 4330:1997
01-september-1997
Photography - Determination of the curl of photographic film and paper
Photography -- Determination of the curl of photographic film and paper
Photographie -- Détermination de l'incurvation des films et papiers photographiques
Ta slovenski standard je istoveten z: ISO 4330:1994
ICS:
37.040.20 )RWRJUDIVNLSDSLUILOPLLQ Photographic paper, films
IRWRJUDIVNHSORãþH)LOPVNL and cartridges
]YLWNL
SIST ISO 4330:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 4330:1997

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SIST ISO 4330:1997
INTERNATIONAL ISO
STANDARD
4330
Third edition
1994-12-15
Photography - Determination of the curl
of photographic film and Paper
Photographie - Determination de I ’incurva tion des films et Papiers
photographiques
Reference number
ISO 4330: 1994(E)

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SIST ISO 4330:1997
ISO 4330: 1994(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. Esch 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.
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 ISO 4330 was prepared by Technical Committee
lSO/TC 42, Photography.
This third edition cancels and replaces the second edition
(ISO 4330:1987), of which it constitutes a technical revision. lt has been
modified to include photographic Paper and provides a method of
measuring the degree of cupping.
Annex A of this International Standard is for information only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST ISO 4330:1997
0 ISO
ISO 4330:1994(E)
Introduction
Curl is a basic property of photographic film and Paper which tan influence
acceptability in many applications. High curl tan lead to Problems in print-
ing, projection and handling.
. . .
Ill

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SIST ISO 4330:1997
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SIST ISO 4330:1997
INTERNATIONAL STANDARD 0 ISO
ISO 4330: 1994(E)
Photography - Determination of the curl of
photographic film and Paper
2.2 curl direction: Means of identifying by letter L,
1 Scope
T, D or C the direction of curl about a specific axis of
a specimen corresponding to that of the Sample from
This International Standard specifies methods for de-
which it is taken.
termining and expressing quantitatively the curl
characteristics of unprocessed and processed photo-
L represents “lengthwise curl” about the axis
graphic film and Paper in sheet, roll, or Strip forms.
perpendicular to the length or machine direc-
tion of the specimen for rolls or to the longer
lt specifies three measuring methods: method A in-
specimen dimension for sheets. An alternative
volves the determination of curl when the specimen
approach when the machine direction is not
is held in a vertical Position, methods B and C with the
known is to reference the curl direction to a
specimen in a horizontal Position. Values for the three
film notch, if present.
methods are not comparable because of the differ-
ences in specimen configuration and size.
T represents “transverse curl” about the axis
parallel to the length or machine direction of
These methods are not intended for use in determin-
the specimen.
ing the curl characteristics of photographic materials
during processing or dtying.
represents “diagonal curl” about the diagonal
D
of the specimen.
C represents “cupping” when all four corners of
2 Definitions
the specimen are raised and bent towards the
centre of the specimen.
For the purposes of this International Standard, the
following definitions apply.
See figure 1.
2.1 curl: Departure from physical flatness and char- 2.3 curl sign: Mathematical sign, + or -, used to
acterized with respect to curl direction (L, T, D or C), indicate the direction of curl which, if toward the
curl sign (+ or -) and curl value. This flatness defect emulsion (sensitized) side (emulsion-in) is -I- or, if
is evident by a tendency of film or Paper to coil into toward the base (emulsion-out), is -. The sign is al-
a cylindrical shape. ways plus for materials sensitized on both surfaces.
1

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SIST ISO 4330:1997
ISO 4330:1994(E)
Cross-machine direction
or widthwise
direction
Transverse curl (T curl)
Figure 1
- Curl direction

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SIST ISO 4330:1997
0 ISO
ISO 4330: 1994(E)
suggested but are not mandatory. Tests tan be con-
3 Sampling and conditioning
ducted in glove boxes or in conditioned rooms; the
latter are preferable since they tan provide better hu-
3.1 Selection of samples
midity control.
Material intended for curl tests shall be representative
Curl value may be influenced by the moisture history
of the whole of the samples being tested, exhibit no
of the material. This may be standardized by an initial
obvious physical defects, be handled in the same
preconditioning step at 50 % relative humidity.
manner as in actual use, and be treated uniformly.
When different materials are to be compared, they
shall have been subjected to the same relative hu-
4 Test method A
midity history for similar times. The machine direction
shall be indicated, if known, by Crayon or ink marking.
4.1 Field of application
This method is intended mainly for samples of film
3.2 Handling of specimens
or Paper in sheet form or in rolls which do not show
Prepare specimens under controlled relative humidity cupping but curl in only L, T or D directions.
conditions, and then separate them into groups which
are to be subjected to different atmospheric con-
ditions. Wear cotton or other suitable gloves or use
4.2 Specimen size
pincers while handling specimen. Moisture from
hands or fingers will reduce accuracy of test data. The
Prepare at least three Square specimens measuring
Operator shall take care not to breathe on the speci-
from 50 mm x 50 mm to 100 mm x 100 mm from
mens.
each Sample to be tested. Alternatively, circular
specimens measuring from 50 mm to 100 mm in di-
ameter tan be used. Indicate the machine direction,
3.3 Conditioning of specimen
if known.
For analytical purposes, or for specimens which show
Condition specimens at the Chosen relative humidity
cupping or varying curl along the length or width,
until practical moisture equilibrium has been reached.
specimens measuring 50 mm x 5 mm tan be used,
In most instances, this time will be about 2 h for
with specimen tut in both the L and T directions.
photographic films, one day for photographic fibre-
base Papers and 7 days for RC (resin coated)
Papers?
4.3 Unit of curl measurement
Excessive conditi
...