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【英文标准名称】:Photography-Sourcedocumentmicrofilms-DeterminationofISOspeedandISOaveragegradient
【原文标准名称】:摄影.原始文件缩微胶片.ISO感光速度和ISO平均梯度的测定
【标准号】:ISO9848-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC42
【标准类型】:()
【标准水平】:()
【中文主题词】:摄影;胶片感光度;灵敏度;试验;定义;影片;缩微照相;缩微胶卷;缩微品
【英文主题词】:Definition;Definitions;Filmspeeds;Films;Microfilm;Microforms;Micrographics;Photography;Sensitivity;Testing
【摘要】:ThisInternationalStandardspecifiesamethodfordeterminingtheISOspeedandISOaveragegradientofblack-and-whitecameranegativephotographicfilmsusedforfirstgenerationmicrofilmingofsourcedocumentsatexposuretimestypicallyfoundwithtungstensources.Thesesourcedocumentsincludeanyhandwrittenorprintedalphanumericandlinedocumentssuchasbooks,periodicals,businesscorrespondence,andengineeringdrawings.Thevalue-ratingsystemdescribedinthisInternationalStandardisonlyusefultotheconsumerifhisexposureilluminationisfromanincandescenttungstensourceasdescribedin5.3.3.Itisnotintendedtoincludepictorialorcontinuoustonereproduction,computeroutputmicrofilm(COM),reversalprocessedordirectpositivefilmsorotherfilmsexposedbynon-tungstensourcessuchaslaserorcathoderaytube.TheISOspeedandISOaveragegradientvaluesobtainedbyapplyingthisInternationalStandardareintendedforpracticaluseincomparingfilm/processcombinationsandforcomputingexposures.
【中国标准分类号】:G81
【国际标准分类号】:37_040_20;37_080
【页数】:9P;A4
【正文语种】:英语