ISO INTERNATIONAL STANDARD 8127-1 First edition 1989-08-15 ANsl Inrerrat Doc Sec! Micrographics A6 size microfilm jackets Part 1: Five channel jacket for 16 mm microfilm Micrographie- Jaquettes de microfilm de format A6 Partie 1: Jaquette a cinq couloirs pour microfilm de 16 mm Reference number ISO 8127-1 : 1989 (E) No reproduction or networking permitted without license from IHS Not for Resale ISO 8127-1 : 1989 (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 asubjectforwhichatechnical committeehas been established has the right to be represented on that committee.International organizations,govern mental 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 approvat before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8127-1 was prepared by Technical Committee ISO/TC 171, Micrographics and optical memories for document and image recording, storage and use At present Iso 8127 consists of the following part, under the general title Micro- graphics -- A6 size microfilm jackets: Part 1: Five channel jacket for 16 mm microfilm Annex A of this part of ISo 8127 is for information only. ?ISO 1989 Allrights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International OrganizationforStandardization Case postale 56 : CH-1211 Geneve 20 . Switzerland Printed in Switzerland No reproduction or networking permitted without license from IHS Not for Resale ISO 8127-1 : 1989 (E) Introduction Microfilm jackets are a means of arranging units of information in microfilm form into inter-related groups of units or chapters. This arrangement permits correction and addition of information without completely refilming the contents. Microfilm jackets are mainly used in active microfilm systems but may serve as enclosures for storage of strips or single frames of microfilm. In order to help the user and manufacturer of microfilm equipment, standardization of the basic requirements for microfilm jackets has been necessary. Jacketsareused ininformationsystemscomposedofnotonlyjacketsbutalsojacket loaders, file cabinets, readers, reader-printers, and duplicators. When planning a system using more than one microform, appropriate International Standards should be consulted and suitable hardware shouldbe chosen with theview to ensuring system compatibility. Themicrofilm jacketconsistsofasupportsheetandathinneremulsionsheetaffixedto the support sheet at a channel separation area to form the film channel into which microfilm can be inserted. The emulsion sheet is the contact printing surface. There are two types of jackets: those with registration holes and those without. Some jacket loading devices can handle either type of jacket while other loading devices can duplicators,andenlargers. There are two versions of these types of jackets: one with the emulsion sheet on the back and the other with the emulsion sheet on the front to accommodate a different generation of microfilm. Jackets with an emulsion sheet on the back are the more com- a rotary camerawith an evennumberof mirrors. Microfilm is always inserted inthe jacket so thatthe imaged side ofthefilm is incon- tact with the emulsion sheet. When inserted in this way, the microfilm is right-reading from the supp