ISO 71:2014

Overview

ISO 71:2014 - Cinematography - specifies the positions and width dimensions for a 16 mm negative monophonic photographic sound record on 16 mm, 35/16 mm and 35/32 mm motion‑picture film. The standard is intended for preparation and printing of 16 mm release prints and defines how the optical sound track is placed relative to the film reference edge, including the direction of film travel and emulsion orientation.

Keywords: ISO 71:2014, cinematography standard, 16 mm negative, photographic sound record, motion‑picture film, sound track positions, dimensions.

Key Topics

• Scope: Applies to 16 mm negative monophonic photographic sound records on 16 mm, 35/16 mm and 35/32 mm film formats intended for printing 16 mm release prints.
• Positioning: Defines reference edges, directions of film travel (A and B winds), and the location of the sound record for single‑ and dual‑format film (Figures 1–3).
• Dimensions: Numeric dimension values for the sound record geometry are provided in Table 1. Representative dimensions given in the document include:
  • A ≈ 15.20 mm
  • B ≈ 2.03 mm
  • C ≈ 14.48 mm
  • D ≈ 30.43 mm
  • E ≈ 16.02 mm (See ISO 71:2014 for exact tolerances and figure references.)
• Emulsion orientation: Figures show the film with the emulsion facing the observer and note typical wind directions for recording.
• Technical drawings: Figures 1–3 illustrate single 16 mm and dual‑format 35 mm arrangements; Table 1 lists dimension tolerances.

Applications

ISO 71:2014 is used by:

• Film laboratories and optical printing houses for alignment and quality control when creating 16 mm release prints from 16 mm negatives.
• Post‑production and sound departments that prepare negatives for optical soundtrack printing or reformatting between 16 mm and 35 mm stocks.
• Equipment manufacturers (optical soundtrack printers, film perforators and scanners) that require standard track placement and widths.
• Archivists and restorers ensuring historical material is reproduced accurately and compatible with legacy projection/printing systems.
• Standards and compliance teams confirming that material meets international cinematography specifications.

Practical benefits include consistent soundtrack placement for reliable duplication, predictable optical reading by soundtrack readers, and interoperability between film formats and printing workflows.

Related Standards

• ISO 69 - 16 mm motion‑picture film cutting and perforating dimensions
• ISO 3022 - 35 mm film perforated 16 mm (1‑3‑0) cutting and perforating dimensions
• ISO 4243 - Picture image area and photographic sound record on 16 mm release prints

For definitive dimension tolerances, figures, and legal reproduction details consult the official ISO 71:2014 document.