ISO 4241:2001

Cinematography — Theatre projection leader, trailer and cue marks — Specifications

Cinématographie — Amorces, <<trailer>> et <<cue marks>> pour projection en salles — Spécifications

General Information

• Status: Withdrawn
• Publication Date: 14-Nov-2001
• Withdrawal Date: 14-Nov-2001
• ICS: 37.060.20 - Motion picture films. Cartridges
• Technical Committee: ISO/TC 36 - Cinematography
• Drafting Committee: ISO/TC 36/WG 2 - Laboratory and distribution services technology
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 18-Jul-2013

Relations

• Revised: ISO 4241:2013 - Cinematography — Projection leader (time-based), trailer and cue marks — Specifications
• Effective Date: 19-Jan-2013
• Revises: ISO 4241:1987 - Cinematography — Leaders and run-out trailers for 35 mm and 16 mm release prints — Specifications
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4241
Third edition
2001-11-15

Cinematography — Theatre projection
leader, trailer and cue marks —
Specifications
Cinématrographie — Amorces, «trailer» et «cue marks» pour projection en
salles — Spécifications




Reference number
ISO 4241:2001(E)
©
ISO 2001

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ISO 4241:2001(E)
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©  ISO 2001
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ii © ISO 2001 – All rights reserved

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ISO 4241:2001(E)
Contents Page
Foreword.iv
1 Scope.1
2 Normative reference.1
3 Reduction ratio.1
4 General specifications.1
5 Head leader (see Figure 1).2
5.1 Protective section.2
5.2 Splicing frame.2
5.3 Identification section.3
5.4 Synchronizing section.4
5.5 Splicing frame.6
6 Picture section (see Figure 5) .7
6.1 Picture.7
6.2 Motor cue.7
6.3 Changeover cue.7
7 Trailer (foot) leader (see Figure 5) .8
7.1 Splicing frame.8
7.2 Runout section.8
7.3 Identification section.9
7.4 Protective section.10
Annex A (informative) Extraneous materials.11

© ISO 2001 – All rights reserved iii

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ISO 4241:2001(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 4241 was prepared by Technical Committee ISO/TC 36, Cinematography.
This third edition cancels and replaces the second edition (ISO 4241:1987), which has been technically revised.
Annex A of this International Standard is for information only.
iv © ISO 2001 – All rights reserved

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INTERNATIONAL STANDARD ISO 4241:2001(E)

Cinematography — Theatre projection leader, trailer and cue
marks — Specifications
1 Scope
This International Standard specifies the make-up or assembly of leaders and cue marks for 70 mm, 35 mm and
16 mm motion-picture release prints for use in motion-picture theatres and screening rooms.
NOTE Extraneous materials are dealt with in informative annex A.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent edition of the normative document indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 4238:1976, Cinematography — Optical printing ratios for enlargement and reduction of motion-picture film
images — Specifications
3 Reduction ratio
The reduction ratio in the production of the head and foot leaders from 35 mm motion-picture film to 16 mm motion-
picture film shall be in accordance with ISO 4238.
4 General specifications
4.1 Orientation and dimensions of letters and numerals in this International Standard are with respect to 35 mm
motion-picture film and are modified proportionally in accordance with ISO 4238 for 70 mm and 16 mm prints.
4.2 Information appearing in the leader which is printed lengthwise (in the direction of film travel) shall read from
left to right when viewed from the projection lens towards the projector light source with the head end of the film at
the right. Information appearing in the leader which is printed upright shall read normally when the reel is
uppermost and the head of the film hangs down ready for threading (see Figures 1 and 5 for orientation of
information).
4.3 All frames in the head-leader and trailer-leader identification sections (see 5.3 and 7.3) and in frames 1
through 171 of the head-leader synchronizing section (see 5.4) shall be masked to the nominal anamorphic
projection aperture [20,95 mm (0,825 in) × 17,53 mm (0,690 in)] with clear framelines nominally the height of
anamorphic projection aperture framelines [1,55 mm (0,061 in)]. Frames 172 through 218 of the head-leader
synchronizing section and frames 1 through 87 of the trailer-leader runout section shall be masked to the nominal
anamorphic camera aperture [21,95 mm (0,864 in) × 18,59 mm (0,732 in)] with clear framelines nominally the
height of anamorphic camera-aperture framelines [0,41 mm (0,016 in)].
© ISO 2001 – All rights reserved 1

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ISO 4241:2001(E)
4.4 Since many types of film may be used for leaders, exact neutral densities have not been specified. For the
purpose of this International Standard, the following approximate neutral densities are referred to:
 clear (neutral density less than 0,35);
 black (neutral density greater than 1,95).
5 Head leader (see Figure 1)
5.1 Protective section
The protective section of the leader shall consist of a minimum of 2,44 m (8 linear feet) of transparent or raw stock.
When the protective leader has been reduced to a length of 1,83 m (6 linear feet), it shall be restored to its original
length. Logos, trademarks, part titles, or other extraneous materials, if absolutely necessary, should be placed in
this section.

Repeats frames 44 through 58 of Synchronizing Section.
Film shown as viewed from projection lens towards projector light source.
Cross-hatched frames represent a black background with clear images; non-cross-hatched frames represent a clear
background with black images.
Figure 1 — Head leader
5.2 Splicing frame
A single frame with the upright words “SPLICE HERE” and an arrow pointing to the frameline between this frame
and frame 1 of the identification section to indicate where the protective section joins the identification section. The
clear letters should be at least 3,2 mm (1/8 in) high on a black background.
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ISO 4241:2001(E)
5.3 Identification section
The identification section of the leader shall be 43 frames in length. The identification section of the head leader,
when viewed as specified in 4.2, shall be made up as follows:
Frame 1 — Black.
Frame 2 — The word “BEG” in clear letters 11,1 mm (7/16 in) high printed upright in the centre of the frame, on a
black background.
Frame 3 — Black.
Frame 4 — The word “of” in clear letters 2,4 mm (3/32 in) high printed lengthwise in the centre of the frame, on a
black background.
Frame 5 — Black.
Frame 6 — The words “Subject”, “Reel No.” and “Language” in clear letters 2,4 mm (3/32 in) high printed
lengthwise, on a black background.
Frame 7 — Black.
Frame 8 — The words “Length”, “Titles” and “Track” with clear letters 2,4 mm (3/32 in) high printed lengthwise, on a
black background.
Frames 9-10 — Black.
Frame 11 — The words “Lab”, “Company” and “Prod No.” with clear letters
...