ISO INTERNATIONAL STANDARD 3272-2 Second edition 1994-02-01 Microfilming of technical drawings and other drawing office documents Part 2: Quality criteria and control of 35 mm silver gelatin microfilms Micrographie des dessins techniques et autres documents de bureau d'études Partie 2: Criteres et controle de qualité des microfilms gelatino-argentiques de 35 mm ISO Reference number SO3272-2:1994(E) cation for Standardizatior r license with ISO No reproduction or networking permited without license from IHS Not for Resale ISO 3272-2:1994(E) Foreword ISsO (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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO 3272-2 was prepared by Technical Committee ISO/TC 171, Micrographics and optical memories for document and image recording, storage and use. This second edition cancels and replacesthefirst edition (1S0 3272-2:1978), of which it constitutes a technical revision. IsO 3272 consists of the following parts, under the general title Micro- filming of technical drawings and other drawing office documents: --- Part 1: Operating procedures Part 2: Quality criteria and control of 35 mm silver gelatin microfilms Part3:Aperture card for35mmmicrofilm Part 4: Microfilming of drawings of special and exceptional elongated sizes - Part 5: Test procedures for duplicating diazo microfilm images in aperturecards Part 6: Enlargement from 35mm microfilm, quality criteria and con- JO.J Annexes A, B, C and D form an integral part of this part of iSO 3272. ISO1994 byanymeans,electronic or mechanical,includingphotocopying andmicrofilm,withoutper mission in writing from the publisher InternationalOrganizationforStandardization Case Postale 56. CH-1211 Geneve 20 · Switzerland Printed in Switzerland = Not for Resale ISO 3272-2:1994(E) Introduction Drawing offices produce, in addition to drawings, documents which differ between organizations should be possible without ambiguities arising from the use of the information they contain. Microfilming enables the information contained in drawing office docu- port, handling and storage. Faithful reconstitution of a microform can only be accomplished readily if the microform satisfies precise requirements with respect to dimensions and quality. The quality requirements them- selected reduction ratios. This part of ISO 3272 specifies particular aspects of microfilming technical silver microfilm. ili CopyihtmatinalganizatonfSandardization No reproduction or networking permitted without license from IHS Not for Resale