胶片特性说明书e4050_portra_400_W

1、KODAK PROFESSIONALPORTRA400 FilmTECHNICALDATA/COLORNEGATIVEFILMFebruary 2016 E-4050KODAK PROFESSIONAL PORTRA 400 is the worlds finest grain high-speed color negative film. At true ISO 400 speed, this film delivers spectacular skin tones plus exceptional color saturation over a wide range of lighting

2、 conditions. PORTRA 400 Film is the ideal choice for portraitandfashion photography,aswellasfornature, travel and outdoor photography, where the action is fastor the lighting cant be controlled.TECHNOLOGYBENEFITSTORAGE ANDHANDLINGStore unexposed film at 21C (70F) or lowerin the original sealed packa

3、ge. For extended periods, store film at 13C (55F) to preserve consistency.Toavoid moisture condensation onfilm that has been refrigerated, allow the film to warm up to room temperature before opening the package. Typical warm-up times are given in the table below. Incorporates Entertainment Imagings

4、 KODAK VISION Film Technology Antenna Dye Sensitization in cyanand magenta emulsion layers KODAK Proprietary Targeted Advanced Development Accelerators Micro-Structure Optimized KODAK T-GRAIN Emulsions Optimized Emulsion Spectral Sensitivity and Image Modifier Chemistry KODAK ProprietaryDIR Couplers

5、 Unified Film Emulsion TechnologySIZES AVAILABLE Worlds finest-grain400-speed color negative film Ideal forscanning Extraordinary enlargement capability from a 35 mm negative Beautiful, natural skintones and superb color reproduction Optimized sharpness Distinct edges,finedetail Printingcompatiblewi

6、th other KODAK FilmsSizeWarm-Up Times (Hours) to Reach Room Temperatureof 21C (70F) From a Storage Temperature of:-18C (0F)2C (35F)13C (55F)12013412135 magazine112114110-sheet box11211Load and unload roll-film cameras in subdued light. Total darkness is required when you load and unload sheet film h

7、olders.Process film as soon as possible after exposure. Protect negativesfromstronglight,andstoretheminacool,dry place. For long-term storage, keep negatives at a temperature between 2C (35F) and 13C (55F) and at a relative humidity between 30 and 35 percent.DARKROOM RECOMMENDATIONSSize/FormatCodeBa

8、se13550560.13 mm (0.005 inch) acetate12060560.11 mm (0.004 inch) acetateSheets40560.19 mm (0.007 inch) ESTAR ThickAvailability may differ from country tocountry. See your dealer who supplies KODAK PROFESSIONAL Products.Do not use a safelight. Handle unprocessed film in total darkness.EXPOSUREFilm Sp

9、eedUsethespeednumbersinthetablesbelowwithcameras ormetersmarkedforISO,ASA,orDINspeedsorexposure indexes (EIs). Do not change the film-speed setting when metering through afilter.Metering through filtersmay affect lightmeter accuracy; see your meter or camera manual forspecific information. For criti

10、cal work, make a series of test exposures.Light SourceKODAK WRATTENGelatin Filter*ISO SpeedDaylight or Electronic FlashNone400Photolamp (3400 K)No. 80B125Tungsten (3200 K)No. 80A100* For best results without special printing. 2016 Kodak Alaris Inc.DaylightUse the exposures in the table below for ave

11、rage frontlit subjects from 2 hours after sunrise to 2 hours before sunset.Lighting ConditionsShutter Speed (second) and Lens OpeningBright or Hazy Sun on Light Sandor Snow1/500f/16Bright or Hazy Sun (Distinct Shadows)1/500f/11*Weak, Hazy Sun (Soft Shadows)1/500f/8Cloudy Bright (No Shadows)1/500f/5.

12、6Heavy Overcast or Open Shade1/500f/4* Use f/5.6 for backlit close-up subjects. Subject shaded from the sun but lighted by a large area of sky.Adjustments for Long and Short ExposuresNo filter correction or exposure compensation is required forPORTRA400Filmforexposuresfrom110,000second to 1 second.

13、Forcritical applications with longer exposure times, make tests under your conditions.Electronic FlashUse the appropriate guide number in the table below as starting-point recommendations for your equipment. Select the unit output closest to the number given by your flashmanufacturer. Thenfind the g

14、uide number forfeetor metres. To determine the lens opening, divide the guide number by the flash-to-subject distance. If negatives are consistently too dense (overexposed), use a higher guide number; if they are too thin (underexposed), use a lower number.Unit Output (BCPS)*Guide Number Distances i

15、n Feet/Metres35085/26500100/30700120/361000140/421400170/502000200/602800240/704000280/855600340/1008000400/120* BCPS = beam candlepower secondsFluorescent and High-Intensity Discharge Lamps Use the color-compensating filters and exposure adjustments in the tables below as starting points to expose

16、this film under fluorescent or high-intensity discharge lamps. For critical applications, make aseries of test exposures under your actual conditions.To avoid the brightness and color variations that occur duringasinglealternating-currentcycle,useexposure times of 160 secondorlonger with uorescent l

17、amps; with high-intensity discharge lamps, use exposure times of 1125 second or longer.Type of Fluorescent LampKODAK Color Compensating Filter(s)Exposure AdjustmentDaylight20R + 5M+1 stopWhite40B + 5C+1 2/3 stopWarm White40B + 40C+2 stopsWarm White Deluxe40B + 50C+2 stopsCool White30B+1 stopCool Whi

18、te Deluxe40C + 10M+1 stopHigh-Intensity Discharge Lamp (CCT)KODAK Color Compensating Filter(s)Exposure AdjustmentHigh-Pressure Sodium Vapor50B + 70C+2 2/3 stopsMetal Halide5C + 10M+2/3 stopMercury Vapor with Phosphor30B + 5C+1 stopMercury Vapor without Phosphor80R+1 2/3 stopRETOUCHINGYoucanretouch t

19、he sheetand 120 sizeon both the base side and the emulsion side. Retouch only the emulsion side on the 135 size.PROCESSINGProcess PORTRA 400 Film in KODAK FLEXICOLORChemicalsforProcess C-41usingthereplenishmentand wash ratesinthetables below. Note thatthedeveloper replenishment rates are starting-po

20、int recommendations only and mayvary due to the amount ofexposure to the film, scene content, and the presence/absence of sprocket holes.Replenishment and Wash RatesFilm SizeKODAK FLEXICOLORDeveloper ReplenisherKODAK FLEXICOLORDeveloper Replenisher LORRKODAK FLEXICOLORBleach III, Fixer, and Stabiliz

21、erWash Water*1351400 mL/m2130 mL/ft2700 mL/m265 mL/ft2861mL/m2 80 mL/ft231 L/m22.9L/ft21201400 mL/m2130 mL/ft2700 mL/m265 mL/ft21023 mL/m295 mL/ft231 L/m22.9L/ft24 x 5 inch1722 mL/m2160 mL/ft2861 mL/m280 mL/ft21152 mL/m2107 mL/ft259 L/m25.5L/ft2* Rates are for first wash and a two-stage countercurre

22、nt final wash. Double these rates for a single stage final wash.2KODAK PROFESSIONAL PORTRA 400 Film E-4050JUDGING NEGATIVE EXPOSURESYoucan check the exposure level with asuitable electronic densitometer equipped with a filter such as a KODAK WRATTEN Gelatin Filter No. 92 or the red filter for Status

23、 M densitometry. Depending on the subject and the lightsource used for exposure, a normally exposed and processed color negative measured through the red filter should have the approximate densities listed below.Because of the extreme range in skincolor, use these red densityvaluesforanormallylitfor

24、eheadonlyasaguide. For best results, use a KODAK Gray Card (gray side).Area MeasuredDensity ReadingKODAKGray Card (gray side) receiving same illumination assubject0.77 to 0.87Lightest step (darkest in the negative) of a KODAK Paper Gray Scale receiving same illumination assubject1.13 to 1.23Highest

25、diffuse density on normally lighted foreheadlight complexiondark complexion1.08 to 1.180.93 to1.03PRINTING NEGATIVESThis film is optimized for printing to KODAK PROFESSIONAL ENDURA Premier PaperKODAK PROFESSIONAL ENDURA Premier Canvas PaperKODAK PROFESSIONAL ENDURA Premier Metallic PaperKODAK PROFES

26、SIONAL ENDURA Transparency Display MaterialKODAK PROFESSIONAL ENDURA Clear DisplayMaterialSCANNING NEGATIVESYoucan easily scan PORTRA 400 Film negatives with a variety oflinear-array-CCD, area-array-CCD, and PMTfilm scanners. Youcanscan negatives on desktop scanners as well as high-end drum scanners

27、.IMAGE STRUCTUREPrint Grain IndexThe Print Grain Index number refers to a method of defining graininess in a print made with diffuse-printing illumination.Itreplacesrmsgranularityandhasadifferent scale which cannot be compared to rms granularity. Themethod usesa uniformperceptual scale,witha change

28、offour units equaling a just noticeable difference in graininess to 90 percent of observers. A Print Grain Index rating of 25 on the scale represents the approximate visual threshold forgraininess. A higher number indicates an increase in the amount of graininess observed. Thestandardizedinspection(

29、print-to-viewer) distance for all print sizes is 14 inches, the typical viewing distance for a 4 x 6-inch print. In practice, larger prints will likely be viewed from distances greater than 14 inches, which reduces apparent graininess. Print Grain Index numbers may not represent graininess observed

30、from more specular printing illuminants, such as condenser enlargers.Negative Size: 24 x 36 mm (Size 135)Print Size in inches4x68x1016x20Magnification4.4X8.8X17.8XPrint Grain Index375989Negative Size: 6 x 6 cm (Size 120)Print Size in inches4x68x1016x20Magnification2.6X4.4X8.8XPrint Grain Index253759

31、Negative Size: 4 x 5 Inches (Sheets)Print Size in inches4x68x1016x20Magnification1.2X2X4XPrint Grain IndexLess than 25Less than 2536KODAK PROFESSIONAL PORTRA 400 Film E-40503KODAK PROFESSIONAL PORTRA 400 FilmCURVES4.0Characteristic Curves2.5Spectral-Dye-Density CurvesExposure: Daylight Densitometry: Status M Log H