【英文标准名称】:Photography-Sourcedocumentmicrofilms-DeterminationofISOspeedandISOaveragegradient
【原文标准名称】:摄影.源文件缩微胶片.ISO感光速度和ISO平均梯度的测定
【标准号】:BSISO9848-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-04-05
【实施或试行日期】:2004-04-05
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:缩微照相;缩微胶卷;影片;试验;摄影;胶片感光度;灵敏度;定义;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】:18P.;A4
【正文语种】:英语