1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 8126:2000 ICS 37.0
2、80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Micrographics Duplicating film, silver, diazo and vesicular Visual density Specifications and measurementThis British Standard, having been prepared under the direction of the DISC Board, was published under the authority of t
3、he Standards Board and comes into effect on 15 May 2000 BSI 05-2000 ISBN 0 580 34731 1 BS ISO 8126:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 8126:2000 and implements it as the UK national standard. It supersedes BS
4、 6872:1987 which is withdrawn. 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
5、 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 organizations represented on this subcommittee can be obtained on request to its secretary. Cr
6、oss-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 Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogu
7、e. 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 itself confer immunity from legal obligations. Summary of pages This document compris
8、es a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.Referencenumber ISO8126:2000(E) INTERNATIONAL STANDARD ISO 8126 Secondedition 2000-
9、02-15 MicrographicsDuplicatingfilm,silver, diazoandvesicularVisualdensity Specificationsandmeasurement Micrographie Films de duplication argentiques, diazoques et vsiculaires Densit visuelle Spcifications et mesurageISO8126:2000(E) ii ISO8126:2000(E)iii Contents Page Foreword.iv Introduction.v 1 Sco
10、pe1 2 Normativereferences1 3 Termsanddefinitions.1 4 Measurementofdensity2 4.1 Methodofmeasurementofsilver-gelatinanddiazoduplicates.2 4.2 Methodofmeasurementofvesicularduplicates.2 4.3 Measurementareas.2 4.3.1 Samplingaperture.2 4.3.2 Useofdensitypatches2 5 Visualdiffusetransmissiondensityofduplica
11、temicroformsfromsourcedocumentsandCOM.2 5.1 Silver-gelatinduplicates.2 5.1.1 Positive-appearingduplicates2 5.1.2 Negative-appearingduplicates.3 5.1.3 Directpositiveduplicates.3 5.2 Diazoduplicates.3 6 Projectiondensityofvesicularduplicates3 6.1 Vesicularduplicatesofsourcedocumentmicroforms3 6.1.1 Po
12、sitive-appearingvesicularduplicatesofsourcedocumentmicroforms3 6.1.2 Negative-appearingvesicularduplicatesofsourcedocumentmicroforms.3 6.2 VesicularduplicatesofCOMmicroforms.3ISO8126:2000(E) iv Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodie
13、s(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liais
14、onwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitte
15、esarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectof patentrights.ISOshallnotbeheldresponsibleforidentifyinganyoralls
16、uchpatentrights. InternationalStandardISO8126waspreparedbyTechnicalCommitteeISO/TC171, Document imaging applications, Subcommittee SC 1, Quality. Thissecondeditioncancelsandreplacesthefirstedition(ISO8126:1986)whichhasbeentechnicallyrevised.ISO8126:2000(E)v Introduction Microformsshouldbeofsuchquali
17、tythattheinformationcontainedisclearlylegible,andsuitableforitsintended enduse.Itisthereforeimportantthatdocumentsformicrofilmingconformtomicrofilmingcriteria. Controllingmicroimagedensityhelpstoensurethatgoodresultsareobtained.Theoverallqualityofthemaster directlyaffectsduplicatequality. Sincefirst
18、generationsilverfilmdensitiescanbemeasuredusingregulardensitometers,amethodhadtobefound formeasuringdiazoandvesicularfilmduplicatingfilmsinadditiontosilver-gelatinfilms.Inthecurrentstateofthe art,onlyamethodforvisualdensityhasbeendeveloped. Visualdensityshouldnotbeconfusedwithprintingdensity.Theform
19、erisameasurementtakingaccountofthe eyesspectralsensitivitywhereasthelatterisameasurementlimitedtothespectralsensitivityofthereceiving materialandthespectralenergydistributionoftheprintingillumination.INTERNATIONALSTANDARD ISO8126:2000(E)1 MicrographicsDuplicatingfilm,silver,diazoandvesicular Visuald
20、ensitySpecificationsandmeasurement 1 Scope ThisInternationalStandardspecifiesvisualdiffusetransmissiondensitiesforsecondgenerationsilver-gelatinand diazomicroformsandprojectiondensitiesforsecondgenerationvesicularmicroforms.Italsospecifiesmethodsof measurement. Itdoesnotapplytoduplicatesofmicroforms
21、oftechnicaldrawingsandotherdrawingofficedocuments. 2 Normativereferences Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentamendmentsto,orrevisionsof,anyofthese publicationsdonotapply.However,
22、partiestoagreementsbasedonthisInternationalStandardareencouragedto investigatethepossibilityofapplyingthemostrecenteditionsofthenormativedocumentsindicatedbelow.For undatedreferences,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIEC maintainregistersofcurrentlyvalidInternati
23、onalStandards. ISO5-1:1984, Photography Density measurements Part 1: Terms, symbols and notations. ISO5-2:1991, Photography Density measurements Part 2: Geometric conditions for transmission density. ISO5-3:1995, Photography Density measurements Part 3: Spectral conditions. ISO6196-1:1993, Micrograp
24、hics Vocabulary Part 1: General terms. ISO6196-3:1997, Micrographics Vocabulary Part 3: Film processing. ISO6196-4:1998, Micrographics Vocabulary Part 4: Materials and packaging. ISO6196-5:1987, Micrographics Vocabulary Part 5: Quality of images, legibility, inspection. ISO6200:1999, Micrographics F
25、irst generation silver-gelatin microforms of source documents Density specifications and method of measurement. 3 Termsanddefinitions ForthepurposesofthisInternationalStandard,thetermsanddefinitionsgiveninISO5andISO6196apply.ISO8126:2000(E) 2 4 Measurementofdensity 4.1 Methodofmeasurementofsilver-ge
26、latinanddiazoduplicates DensityshallbemeasuredwithadensitometerinconformancewiththerequirementsofISO5-2andISO5-3for measurementofISOstandarddiffusevisualdensityandhavingasamplingapertureofdiameter0,5mmto3,0 mm. 4.2 Methodofmeasurementofvesicularduplicates Densityshallbemeasuredwithadensitometerincon
27、formancewiththerequirementsofISO5-2andISO5-3for measurementofISOstandardprojectiondensityf/4,5typeandhavingasamplingapertureofdiameter0,5mmto 3,0mm. 4.3 Measurementareas 4.3.1 Samplingaperture Eachareameasuredshouldbeofevendensityandcompletelycoverthesamplingapertureofthedensitometer. 4.3.2 Useofden
28、sitypatches Densityisgenerallymeasuredonasinglearea.However,ifdensitiesoftheimagesdonotappearuniform throughoutthemicroform,itisrecommendedtocarryoutmeasurementsondifferentimageareasthroughoutthe microform,withparticularattentionbeingpaidtolowestdensityareas. Minimumdensityofdirectpositivesilverandn
29、egative-appearingdiazoduplicates,andmaximumdensityof (positive-appearingdiazo)andvesicularduplicatesshouldpreferablybemeasuredonanimage,incompliancewith ISO6200,ofa6%reflectancepatchcomprisingpartofatesttargetfilmedontheoriginalmicroform. Intheabsenceofareflectivepatch,measurementsmaybemadebetweenim
30、agesalthoughthesemaydiffer slightlyfromthoseobtainedfroma6%patch. Atargetareamaybeprovidedforthispurposewhenmakingfirstgenerationmicroforms. 5 Visualdiffusetransmissiondensityofduplicatemicroformsfromsourcedocuments andCOM 5.1 Silver-gelatinduplicates 5.1.1 Positive-appearingduplicates Silver-gelati
31、nduplicatesofcorrectlyexposedandprocessedfirstgenerationmicroformsshallhavebackground visualdiffusetransmissiondensityintherange0,05to0,15. Highquality/contrastdocumentsshouldhavebackgroundvisualdiffusetransmissiondensityinthelowendofthis rangeandlowquality/contrastdocumentsshouldhavebackgroundvisua
32、ldiffusetransmissiondensityinthehigh endofthisrange. Positiveappearingduplicatesarenormallyusedonlyfordistributioncopies.ISO8126:2000(E)3 5.1.2 Negative-appearingduplicates DirectnegativeduplicatesshallhaveaminimumvisualdiffusetransmissiondensityintherangefrominherentD min to0,18andshouldbeabovethei
33、nherentD min oftheduplicatingfilm.Thedensityismeasuredeitheronanimageof a6%reflectancetargetprovidedforthepurposeorintheclearareasbetweentheframes. 5.1.3 Directpositiveduplicates 5.1.3.1 Directpositivedistributioncopies Directpositiveduplicatesshallhaveminimumvisualdiffusetransmissiondensitynotgreat
34、erthan0,18andshould beabovetheinherentD min oftheduplicatefilm. 5.1.3.2 Directpositiveintermediates Directpositiveintermediatesshallhaveminimumvisualdiffusetransmissiondensitynotgreaterthan0,25and shouldbeabovetheinherentD min oftheduplicatefilm. 5.2 Diazoduplicates Allnegative-appearingdiazoduplica
35、temicroformsshouldhavemaximumdensityatorneartothatofthe unexposed,fullydevelopedfilm.Duplicatesonblackordarkbluelinefilmshouldhavebackgrounddensitynotless than1,30.MinimumdensityoftheduplicateshouldbeabovetheinherentD min ofthediazofilmandshallbenot greaterthan0,15,andforlowcontrasttonaldiazofilm,no
36、tgreaterthan0,90. 6 Projectiondensityofvesicularduplicates 6.1 Vesicularduplicatesofsourcedocumentmicroforms 6.1.1 Positive-appearingvesicularduplicatesofsourcedocumentmicroforms Positive-appearingvesicularduplicatesofsourcedocumentmicroformsshallhavemaximumbackground projectiondensitynotgreaterthan
37、0,25. 6.1.2 Negative-appearingvesicularduplicatesofsourcedocumentmicroforms Negative-appearingvesicularduplicatesofsourcedocumentmicroformsshallhaveminimumbackground projectiondensitynotlessthan1,20,andshouldbebelowtheinherentD max oftheduplicatefilm. 6.2 VesicularduplicatesofCOMmicroforms Vesicular
38、duplicatesofpositiveappearingCOMmicroformsshallhaveminimumbackgroundprojectiondensitynot lessthan1,80,andshouldbebelowtheinherentD max oftheduplicatefilm.BS ISO 8126:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
39、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK
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