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1、RelatedCommercialResourcesCHAPTER20PHOTOGRAPHICMATERIALFACILITIESStoringUnprocessedPhotographicMaterials.............................................................................20.1ProcessingandPrintingPhotographicMaterials..........................
2、.............................................20.1StoringProcessedFilmandPaper...............................................................................................20.3PROCESSINGandstoringsensitizedphotographicproductscombinesmanyindividualrolls
3、offilmintoalongrolltobepro-requirestemperature,humidity,andairqualitycontrol.Manu-cessed.Athighrelativehumidity,photographicemulsionsbecomefacturersofphotographicproductsandprocessingequipmentpro-softandcanbescratched.Atexcessivelylowrelativehumidity,th
4、evidespecificrecommendationsforfacilitydesignandequipmentfilmbaseispronetostatic,sparking,andcurldeformation.Thepre-installationthatshouldalwaysbeconsulted.Thischaptercontainsspliceworkareashouldbemaintainedat50to55%rhand70togeneralinformationthatcanbeu
5、sedinconjunctionwiththeserec-75°Fdb.Roompressuresshouldcascadedownwardfromareasofommendations.SeeChapter29forinformationongeneralindus-higherairqualitytoareasoflowerairquality(cleantodirty).trialventilation.AirConditioningforProcessingOperationsSTORINGU
6、NPROCESSEDPHOTOGRAPHICMATERIALSProcessingexposedfilmsorpaperinvolvesusingaseriesoftem-peredchemicalandwashtanksthatemitheat,humidity,andvaporsVirtuallyallphotosensitivematerialsdeterioratewithage;theorgases(e.g.,watervapor,aceticacid,benzylalcohol,ammon
7、ia,rateofphotosensitivitydeteriorationdependslargelyonthestoragesulfurdioxide).Roomexhaustmustbeprovided,alongwithlocalconditions.Photosensitivitydeteriorationincreasesbothathighexhaustatnoxioustanks.Toconserveenergy,airfrompressurizedtemperatureandathi
8、ghrelativehumidityandusuallydecreasesatprespliceroomscanbeusedasmakeupforprocessingroomlowertemperatureandhumidity.exhaust.FurthersupplyairshouldmaintaintheprocessingspaceatHighhumiditycanacceleratelossofsensitivityandcontrast,am
