KODAK PROFESSIONAL T400 CN Film (Process C-41)

—Notice of Discontinuance—

This film has been discontinued. As a recommended alternative, we suggest KODAK PROFESSSIONAL BW400CN Film.

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Contents

• DESCRIPTION
• SIZES AVAILABLE
• STORAGE AND HANDLING
• DARKROOM RECOMMENDATIONS
• EXPOSURE
  • Daylight
  • Existing Light
  • Electronic Flash
  • Exposure Adjustments for Long and Short Exposures
  • Filter Factors
• PROCESSING
• PUSH PROCESSING
• NEGATIVE APPEARANCE
• JUDGING NEGATIVE EPOSURE
• RETOUCHING
  • Dye / Filter "Layering" Technique
• PRINTING NEGATIVES
  • Color Papers and Display Materials
  • KODAK EKTAMAX RA Professional Paper
  • Black-and-White Papers
• IMAGE STRUCTURE
• CURVES

DESCRIPTION

KODAK PROFESSIONAL T400 CN Film is a 400-speed, multi-purpose, black-and-white film designed for processing in Process C-41 with color negative films. The panchromatic film can be printed on either black-and-white papers or color negative papers. You can also make prints for short-term intermediate use on KODAK PROFESSIONAL PORTRA Black & White Paper.

The film is intended for exposure with daylight, electronic flash, and artificial illumination. You can also obtain pleasing results under other light sources, i.e. illumination in stadiums, without using filters.

You can use filters when exposing this film to vary the tone and contrast. Results are similar to conventional black-and-white films.

This film incorporates KODAK T-GRAIN® Emulsions, providing extremely fine grain and sharpness with relatively high speed.

You can use this film for general, advertising, education, industrial, law enforcement, medical, newspaper, portrait, real estate, scientific, sports, wedding, and other black-and-white photographic applications.

SIZES AVAILABLE

Sizes and CAT numbers may differ from country to country. See your dealer who supplies KODAK PROFESSIONAL Products.

*For worldwide (other than United States and Canada)

**For U.S. and Canada

STORAGE AND HANDLING

Load and unload your camera in subdued light.

High temperatures or high humidity may produce unwanted quality changes. Store unexposed film at 70°F (21°C) or lower in the original package. Always store film (exposed or unexposed) in a cool, dry place. For best results, process film as soon as possible after exposure.

Protect processed film from strong light, and store it in a cool, dry place. For more information on storing negatives, see KODAK Publication No. E-30, Storage and Care of Photographic Materials--Before and After Processing.

DARKROOM RECOMMENDATIONS

Do not use a safelight. Handle unprocessed film in total darkness.

Important: This film cannot be processed in conventional black-and-white chemicals. It must be processed in KODAK FLEXICOLOR Chemicals, Process C-41, or compatible chemicals. See "Processing."

EXPOSURE

Daylight

Use the exposures in the table below for average frontlit subjects from 2 hours after sunrise to 2 hours before sunset.

*Use f/5.6 for backlit close-up subjects.

**Subject shaded from the sun but lit by a large area of clear sky.

Existing Light

*Leave shutter open for several bursts.

**Use a tripod or other firm camera support for exposure times longer than 1/30 second.

***Use shutter speeds of 1/60 second or longer with fluorescent light.

Electronic Flash

Use the guide number in the following table as a starting point for your equipment. Select the unit output closest to the number given by your flash manufacturer. Then find the guide number for feet or 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.

*BCPS = beam candlepower seconds

Exposure Adjustments for Long and Short Exposures

No exposure compensation for reciprocity failure is necessary for exposures between 1/10,000 and 120 seconds. We do not recommend exposures longer than 120 seconds. For critical applications, make tests under your conditions.

Filter Factors

Multiply the normal (unfiltered) exposure time by the filter factor.

*Average filter factor, which may vary slightly depending on the manufacturer. Polarizing filters are not manufactured by Kodak.

PROCESSING

Process T400 CN Film in KODAK FLEXICOLOR Chemicals for Process C-41. You can have this film processed by any photofinisher who processes color negative films such as KODAK Bright Sun or PROFESSIONAL PORTRA Film. T400 CN Film is fully compatible with Process C-41, and can be intermixed with color negative films during processing in all equipment, from minilabs to high-volume continuous, roller-transport, or rack-and-tank processors.

You can also use KODAK FLEXICOLOR Chemicals in the 1-gallon size to process this film in a small tank or a rotary-tube processor.

For specifications on Process C-41, see KODAK Publication No. Z-131, Using KODAK FLEXICOLOR Chemicals.

Important: Do not process this film in conventional black-and-white chemicals.

PUSH PROCESSING

T400 CN Film can be rated at higher than normal exposure indexes for photography in dim light or where fast shutter speeds must be maintained. Push processing in Process C-41 results in acceptable negatives from exposure indexes as high as 3200.

Note: Not all processing equipment can be used for push processing, and many photofinishers do not offer this service. Check with your lab or photofinisher before rating this film higher than EI 800.

NEGATIVE APPEARANCE

The appearance is similar to color negative films, but with much lower D-min or base density. The film base of these processed negatives will appear light brown to orange. This is normal, and will not affect the image quality or printing characteristics.

JUDGING NEGATIVE EXPOSURE

You can check the exposure level with a suitable densitometer equipped with a filter such as a KODAK WRATTEN Gelatin Filter No. 92 or the red filter for Status M densitometry. Depending on the subject and the light source 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 skin color, use these red density values for a normally lighted forehead only as a guide. For best results, use a KODAK Gray Card (gray side).

RETOUCHING

Treat the negative as if it were a color negative.

You can retouch 120 size of T400 CN Film on both the emulsion and base sides. The 135-size can be retouched on the emulsion side only.

Both retouching dye and black graphite lead pencil can be used to retouch this film. When retouching with a pencil on the emulsion side, use KODAK Retouching Fluid to improve the tooth of the film.

If you plan to use retouched T400 CN Film for printing on color negative paper, follow the "Dye / Filter Layering" Technique.

Dye / Filter "Layering" Technique

To retouch small areas, use diluted KODAK Liquid Retouching Colors. For most retouching, you will need only two dyes: red-yellow and cyan. Prepare the diluted dyes according to the following formulas:

1. Hold a WRATTEN Gelatin Filter No. 58 (green) near your eye, and view the negative through the filter. Evaluate the areas to be retouched; if they appear lighter than the surrounding areas, apply red-yellow dye by using the technique described in step 2.
   
   
2. Dip the brush into the dye, and stroke the tip on water-dampened cotton, tissue, or paper towel until the tip is almost dry. Smoothly apply a small amount of dye to the base side of the negative.* When you retouch along sharp edges in an image or make very fine corrections, apply dye to the emulsion side. This allows for more precise alignment of the retouching with the image and avoids parallax problems from inaccurate application.
   
   
3. Hold a WRATTEN Gelatin Filter No. 25 (red) near your eye, and view the negative through the filter. Evaluate the areas to be retouched; if they appear lighter than the surrounding area, apply cyan dye by using the technique described in step 2.
   
   
4. View the negative without using a filter. If a retouched area appears slightly red or slightly cyan, add avery small amount of the opposite-colored dye until the area appears neutral.

*The base side of a roll-film negative faces you when the edgeprinting reads correctly. The base side of a sheet-film negative faces you when the code notch is at the top left edge of the sheet.

After you've finished retouching and the negative is dry, sandwich the T400 CN negative with a piece of unexposed and processed D-min of another color negative film, such as KODAK PROFESSIONAL PORTRA 160VC Film. Although you can print it onto color paper without the "extra D-min," this may make it easier to print on color paper.

For more information about retouching techniques, supplies, and equipment, see KODAK Publication E-71, Retouching Color Negatives.

PRINTING NEGATIVES

Printing on Color Papers and Display Materials

T400 CN Film is designed to deliver excellent black-and-white prints on either color or black-and-white photographic papers. When printing on color papers, you can also create special-effect tones, such as sepia, by changing the printer color balance.

KODAK PROFESSIONAL T400 CN Printer Balancing Kit is available to help photofinishers optimize a printer channel to print this film on KODAK PROFESSIONAL PORTRA III, PROFESSIONAL SUPRA III, EKTACOLOR Edge 8, or EKTACOLOR ROYAL VIII Papers, so that it can be printed along with color negative films. This means you can receive high-quality black-and-white prints in the same amount of time as it takes your finisher to process and print a roll of color film.

You can also make black-and-white prints from T400 CN negatives by enlarging them on PROFESSIONAL PORTRA III and SUPRA III Papers or KODAK DURAFLEX® Plus Digital Display Material.

You can make black-and-white transparencies by direct exposure onto KODAK DURATRANS® Plus or DURACLEAR^TM Plus Display Materials, or VERICOLOR Slide or VERICOLOR Print Films.

When working with a color enlarger to print on PROFESSIONAL or EKTACOLOR Papers and DURAFLEX or DURACLEAR Display Materials, use a starting filter pack of 70M and 75Y, and make filter adjustments to balance the print to a desired tone.

Printing on KODAK EKTAMAX RA Professional Paper

You can make black-and-white prints by enlarging them on KODAK PROFESSIONAL PORTRA Black & White Paper for Process RA-4. PORTRA Black & White Paper is intended for interim use, such as school picture proofing, and is not recommended where long-term print keeping is desired.

Printing on Black-and-White Papers

You can make black-and-white prints by enlarging them as you would any other black-and-white negative. You can use a graded paper, such as KODABROME II RC or a selective-contrast paper, such as KODAK POLYMAX Fine-Art Paper.

If you print on graded black-and-white papers, a normal exposure on this film will print well at grade 3.

When printing on selective-contrast papers with KODAK POLYMAX II Filters, a normally exposed negative will print well with a 3 or 3 ½ filter. The light brown to orange color of the T400 CN Film base does not affect contrast control with POLYMAX II Filters.

IMAGE STRUCTURE

Sharpness: Extremely high

Degree of Enlargement: Extremely high

RMS Granularity: 9 (Extremely fine)
(Read at a net diffuse visual density of 1.00, with a 48-micrometre aperture.)

CURVES

Characteristic Curve

Spectral-Sensitivity Curve

Spectral-Dye-Density Curves

Note: The Kodak materials described in this publication for use with KODAK PROFESSIONAL T400 CN Film are available from dealers who supply KODAK PROFESSIONAL Products. You can use other materials, but you may not obtain similar results.

Kodak, Kodak Professional, Duraclear, Duraflex, Duratrans, Ektacolor, Ektamax, Estar, Flexicolor, Gold, Kodabrome, Polymax, Portra, Royal, Supra, T-Grain, Ultra, Wratten, and Vericolor are trademarks.

F-2350 • Revised February 2002