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 measurementThis British Standard, having been prepared under the direction of the DISC Board, was published unde
3、r 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. Date Comments National foreword This British Standard reproduces verbatim ISO 6200:1999 and implements it as the UK national
4、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: aid enquirers to understand the text; present to the responsible international/European committee any enquir
5、ies 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 organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Br
6、itish Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard
7、 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 itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an
8、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 document was last issued.A Referencenumbe r ISO6200:1999 (E) INTERNATIONAL STANDARD ISO 6200 Thirdediti
9、on 19991015 MicrographicsFirstgeneration silvergelatinmicroformsofsource documentsDensityspecificationsand methodofmeasurement MicrographieMicroformesdocumentairesglatinoargentiquesde premiregnrationSpcificationsdesdensitsetmthodede mesurageISO6200:1999(E) ii Foreword ISO (the InternationalOrganizat
10、ionforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee
11、.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirecti
12、ves,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO 6200waspreparedbyTechnicalCommitteeISO/TC 171,Documentimaging applica
13、tions,SubcommitteeSC1, Quantificationofqualitylevelsandcontrolprocedures. Thisthirdeditioncancelsandreplacesthesecondedition(ISO6200:1990)whichhasbeentechnicallyrevised. ISO6200:1999(E) iii Introduction Microformsshouldbeofsuchqualit ythatthein formationcontainedisclearlylegible,andsuitableforitsint
14、ended use.Itisthereforeimportantthatdocumentsformicrofilmingconformtomicrofilmingcriteria. Controllingmicroimagedensityhelpstoensurethatgoodresultsareobtained.INTERNATIONALSTANDARD ISO6200:1999(E) 1 MicrographicsFirstgenerationsilvergelatinmicroformsof sourcedocumentsDensityspecificationsandmethodof
15、 measurement 1Scope ThisInternationalStandardspecifiesamethodformeasuringdensitieso ffirstgenerationsilvergelati nmicroforms. Itspecifiesdensityvaluesfordifferentqualitiesofdocuments. Itappliestosourcedocumentnegativeappearingmicroforms. Itdoesnotapplytomicroformsfortechnicaldrawingswhicharedealtwit
16、hinISO32722,or to diazo and vesicular filmswhicharethesubjectofISO8126,ortoCOMmicroformswhicharedealtwithinISO8514. 2Normativereferences The following normativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentame
17、ndmentsto,orrevisionsof ,anyofthese publications do not apply. However, partiestoagreementsbasedonthisInternationalStandardareencouragedto investigatethepossibilityofapplyingthemostrecenteditionsofth enormativedocumentsindicatedbelow.For undatedreferences,thelatesteditionofthenormativedocumentreferr
18、edtoapplies.MembersofISOandIEC maintainregistersofcurrentlyvalidInternationalStandards. ISO51:1984, PhotographyDensitymeasurementsPart1:Terms,symbolsandnotations . ISO52:1991, PhotographyDensitymeasurementsPart2:Geometricconditionsfortransmissiondensity . ISO53:1995, PhotographyDensityMeasurementsPa
19、rt3:Spectralconditions . ISO61961:1993, MicrographicsVocabularyPart1:Generalterms . ISO61964:1998, MicrographicsVocabularyPart4:Materialsandpackaging. ISO61965:1987, MicrographicsVocabularyPart5:Qualityofimages,legibility,inspection. ISO61966:1992, MicrographicsVocabularyPart6:Equipment. 3Termsandde
20、finitions ForthepurposesofthisInternationalStandard,thetermsanddefinitionsgiveninISO51andISO6196apply. 4Methodofmeasurement DensityshallbemeasuredwithadensitometerinconformancewiththerequirementsofISO52andISO53for measurementofISOstandarddiffusevisualdensityandhavinganapertureofdiameter0,5mmto3,0mm.
21、ISO6200:1999(E) 2 Eachareameasuredshouldbeofevendensityandcompletelycovertheapertureo fthedensitometer.Atarget areacanbeprovided forthispurposewhen making firstgeneration microforms. The emulsionsurfaceshallfacethe collectingheadofthedensitometerwhichisusuallyoppositeoftheilluminationlamp. Densityis
22、usuallymeasuredonsampleimages.Ifdensitydoesnotappearvisuallyto beuniformwithinanimage , it isrecommendedthatfurthermeasurementsbemadeatdifferentplaceswithintheimage. 5Densityspecifications BackgrounddensityshallbeasspecifiedinTable1. AllvaluesspecifiedareISOstandardvisualdiffusedensities.Thebackgrou
23、nddensitiesgiveninTable1are densitiesabovebaseplusfog.Therefore,foralldensityreadings,thevalueofbaseplusfogshallb esubtractedto enablecomparisonwiththedensityrequirementsspecifiedinTable1. Thebaseplusfogdensityformicroformswithclearbaseshallbenotgreaterthan0,10. Somesilvergelatinmicroformshaveatinte
24、dbase(greybaseforexample) .Thebaseplusfogdensityforthese filmsisoftenhigherthan0,10duetothehigherdensityofthebase.Wher eappropriate,specificrecommendations fromthefilmmanufacturershouldbefollowedforbackgrounddensity. Documentswhichcontainfinelinedetails,orcomplexcharacterssuchasChineseandJapanese,ma
25、yrequire lowerbackgrounddensityvaluesthanthosespecifiedinTable1,withalowerlimitof0,70. Whenthecontentofadocumenthasareasofdifferentqualities,thedensity to be achieved shall be dictated by the lowestquality. Table1Backgrounddensities Document Group DocumentDescri ption Background density 1 Denseblack
26、wellformedcharactersandlinesofhigheffective contrast. 1,00to1,50 a 2 Group1documentswithfinelines,ordocumentswit hlower densityprintormediumeffectivecontrast,typica lofgeneral commercialdocuments. 0,90to1,10 3 Loweffectivecontrastdocuments. 0,80to1,00 b 4 Veryloweffectivecontrastdocuments. 0,70to0,8
27、5 b NOTE Whenfil mingasetofveryunifor mhighqualitydocu mentsabackgrounddensityofu p to 1,50 is allowable, howeveramaximumrangeof0,20withinagroupofimagesshouldbemaintained. a Whenfilmingdoublesideddocu mentswithnoticableshowthrough,densities maybereducedtoreducei mage showthrough. b 1:24reductionorle
28、ssrecommended.BS ISO 6200:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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