ISO INTERNATIONAL STANDARD 9848 Second edition 2003-12-01 Photography Source document microfilms Determination of IsO speed and IsO average gradient Photographie - Microfilms de prises de vue - Determination de la sensibilite IsO et du contraste moyen IsO Reference number ISO 9848:2003(E) ISO @ ISO 2003 T by IHS under lic itted without license from IHS Not for Resale ISO 9848:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @IsO2003-All rights reserved ermittedwithoutlicense from IHS Not for Resale ISO 9848:2003(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Terms and definition 4 Sampling and storag 5 Test method. 5.1 Principle 5.2 Safelights 5.3 Exposure.... 5.4 Processing 5.5 Densitometry 5.6 Evaluation 6 Product classification 6.1 Iso speed...... 6.2 Iso average gradient 6.3 Accuracy ..... 7 Product marking and labelling 7.1 7.2 Average gradient... 7.3 General Annex A (informative) Use of Iso speed values.. Bibliography Copyrght International Organizaion for standardization rights reserved ili Not for Resale ISO 9848:2003(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 beer non-governmental,inliaisonwithIsO,also take part in the work.Iso collaborates closely with the International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 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 document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 9848 was prepared by Technical Committee ISO/TC 42, Photography. This second edition cancels and replaces the first edition (isO 9848:1993), which has been technically revised. @Iso 2003 - All rights reserved onal Organization for Standardizatior ISO 9848:2003(E) Introduction This International Standard describes the method for determining the IsO speed and IsO average gradient of camera negative microfilms exposed with an incandescent tungsten source at a distribution temperature of 2 650 K ± 100 K (to simulate “undervolted" photoflood). The IsO speed and IsO average gradient determined by applying this International Standard are for the process conditions (developer, time, temperature, agitation, etc.) and some films will provide satisfactory Standard. They should be specified when the sensitometric values are quoted in manufacturer's literature to enable proper interpretation. and isO average gradient