TS ISO 3272-1

TS ISO 3272-1 addresses the operating procedures and size relationships used when recording technical drawings and other drawing office documents on 35 mm unperforated microfilm. It defines the reduction and enlargement ratios, together with the resulting image dimensions, so that drawings, notes and lists can be reproduced on microfilm in a controlled and legible way.

How microfilming terms fit together

Microfilm is a compact recording medium used to preserve large-format documents in a much smaller physical form. In this context, the key issue is not only shrinking the original, but preserving readable image detail. Technical drawings, architects' plans, calculation notes, specifications, vocabularies and parts lists differ in layout and information density, so scale relationships matter. The standard focuses on suitable recording dimensions for this family of drawing-office materials rather than on microfilming in general.

What this standard covers

• Reduction ratios for recording on 35 mm unperforated microfilm
• Enlargement ratios and enlargement sizes
• Resulting image sizes
• Technical drawings and other drawing office documents
• Document types such as architects' plans, calculation notes, specifications, vocabularies and parts lists

In microfilming practice, the chosen ratios influence archive quality, later retrieval and the usability of copied images. The balance between document format, drawing size and detail density therefore matters. TS ISO 3272-1 serves as the part of the series that standardises these size relationships for technical drawings and related office documents.