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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 6200:1999 ICS 37.0
2、80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Micrographics First generation silver-gelatin microforms of source documents Density specifications and method of measurement Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (
3、c) BSI This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 BSI 03-2000 ISBN 0 580 34291 3 BS ISO 6200:1999 Amendments issued since publication Amd. No.DateComments Natio
4、nal foreword This British Standard reproduces verbatim ISO 6200:1999 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee IDT/1, Document imaging applications, to Subcommittee IDT/1/1, Quality, which has the responsibility to: ai
5、d enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizat
6、ions represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Corresponde
7、nce Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itse
8、lf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 and 2, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the d
9、ocument was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI A Reference number ISO 6200:1999(E) INTERNATIONAL STANDARD ISO 6200 Third edition 1999-10-15 Micrographics First generation silver-gelatin microforms of source document
10、s Density specifications and method of measurement Micrographie Microformes documentaires glatino-argentiques de premire gnration Spcifications des densits et mthode de mesurage Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6200:1999(E
11、) ii 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 whic
12、h 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 ma
13、tters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stand
14、ard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 6200 was prepared by Technical Committee ISO/TC 171, Document imaging applications, Subcommittee SC 1, Quantification of quality levels and control procedures. This third edition cancels and replac
15、es the second edition (ISO 6200:1990) which has been technically revised. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6200:1999(E) iii Introduction Microforms should be of such quality that the information contained is clearly legibl
16、e, and suitable for its intended use. It is therefore important that documents for microfilming conform to microfilming criteria. Controlling microimage density helps to ensure that good results are obtained. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolle
17、d Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 6200:1999(E) 1 Micrographics First generation silver-gelatin microforms of source documents Density specifications and method of measurement 1 Scope T
18、his International Standard specifies a method for measuring densities of first generation silver-gelatin microforms. It specifies density values for different qualities of documents. It applies to source document negative-appearing microforms. It does not apply to microforms for technical drawings w
19、hich are dealt with in ISO 3272-2, or to diazo and vesicular films which are the subject of ISO 8126, or to COM microforms which are dealt with in ISO 8514. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of thi
20、s International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative d
21、ocuments indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 5-1:1984, Photography Density measurements Part 1: Terms, symbols and notations. ISO 5-2:1991,
22、 Photography Density measurements Part 2: Geometric conditions for transmission density. ISO 5-3:1995, Photography Density Measurements Part 3: Spectral conditions. ISO 6196-1:1993, Micrographics Vocabulary Part 1: General terms. ISO 6196-4:1998, Micrographics Vocabulary Part 4: Materials and packag
23、ing. ISO 6196-5:1987, Micrographics Vocabulary Part 5: Quality of images, legibility, inspection. ISO 6196-6:1992, Micrographics Vocabulary Part 6: Equipment. 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 5-1 and ISO 6196 apply. 4 Met
24、hod of measurement Density shall be measured with a densitometer in conformance with the requirements of ISO 5-2 and ISO 5-3 for measurement of ISO standard diffuse visual density and having an aperture of diameter 0,5 mm to 3,0 mm. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT
25、+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6200:1999(E) 2 Each area measured should be of even density and completely cover the aperture of the densitometer. A target area can be provided for this purpose when making first generation microforms. The emulsion surface shall face the collecting head o
26、f the densitometer which is usually opposite of the illumination lamp. Density is usually measured on sample images. If density does not appear visually to be uniform within an image, it is recommended that further measurements be made at different places within the image. 5 Density specifications B
27、ackground density shall be as specified in Table 1. All values specified are ISO standard visual diffuse densities. The background densities given in Table 1 are densities above base plus fog. Therefore, for all density readings, the value of base plus fog shall be subtracted to enable comparison wi
28、th the density requirements specified in Table 1. The base plus fog density for microforms with clear base shall be not greater than 0,10. Some silver-gelatin microforms have a tinted base (grey base for example). The base plus fog density for these films is often higher than 0,10 due to the higher
29、density of the base. Where appropriate, specific recommendations from the film manufacturer should be followed for background density. Documents which contain fine-line details, or complex characters such as Chinese and Japanese, may require lower background density values than those specified in Ta
30、ble 1, with a lower limit of 0,70. When the content of a document has areas of different qualities, the density to be achieved shall be dictated by the lowest quality. Table 1 Background densities Document Group Document Description Background density 1 Dense black well-formed characters and lines o
31、f high effective contrast. 1,00 to 1,50a 2 Group 1 documents with fine lines, or documents with lower density print or medium effective contrast, typical of general commercial documents. 0,90 to 1,10 3 Low effective contrast documents. 0,80 to 1,00b 4 Very low effective contrast documents. 0,70 to 0
32、,85b NOTE When filming a set of very uniform high quality documents a background density of up to 1,50 is allowable, however a maximum range of 0,20 within a group of images should be maintained. a When filming double sided documents with noticable show-through, densities may be reduced to reduce im
33、age show-through. b 1:24 reduction or less recommended. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 6200:1999 BSI 389 Chisw
34、ick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standa
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41、hip Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract
42、 may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbol
43、s, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:09:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
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