Kodak PROFESSIONAL BW400CN Film 8059370 User Manual

KODAK PROFESSIONAL BW400CN Film 

•

 F-4036

Process BW400CN Film in KODAK FLEXICOLOR 
Chemicals for Process C-41. You can have this film 
processed by any photofinisher who processes color negative 
films like KODAK PROFESSIONAL PORTRA Film. 
BW400CN 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.

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

The appearance of processed negatives on BW400CN Film 
is similar to color negative films, but with no color in the 
negative images.

You can check the exposure level of the processed negatives 
with a suitable electronic densitometer equipped with a filter 
such as the red filter for Status M Densitometry, or a 
KODAK WRATTEN Gelatin Filter No. 92. Depending on 
the subject and the light source used for exposure, a normally 
exposed color negative measured through the red filter 
should have the approximate densities listed below. These 
densities apply for the recommended light sources and 
correct processing of the negative.

*

 KODAK Publication No. R-27

†

 Because of the extreme range in skin color, use these values only as a 

guide.  For best results, use a KODAK Gray Card (gray side).

The KODAK Gray Card

*

 (gray side) receiving 

the same illumination as the subject

  0.80 to 1.00

The lightest step (darkest in the negative) of 
a KODAK Paper Gray Scale receiving the 
same illumination as the subject

 1.15 to 1.35

Normally lighted forehead of person with 
light complexion

†

 1.05 to 1.35

Normally lighted forehead of person with 
dark complexion

†

 0.90 to 1.20

Treat the negative as if it were a color negative.

You can retouch 120 / 220-size BW400CN Film on both 

the emulsion and base sides. 35 mm film 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 pencil on the 
emulsion side, use KODAK Retouching Fluid to improve 
the tooth of the film.

If you plan to use retouched BW400CN Film for printing 

on color negative paper, follow the Dye / Filter “Layering” 
Technique.

For more information about retouching techniques, 

supplies, and equipment, see KODAK Publication E-71, 
Retouching Color Negatives.

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.

Note: 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.

Red-yellow

5 drops 
red dye 
plus 1 
drop 
yellow dye 
plus 
distilled 
water

18 drops 
distilled 
water 
(1:3)

30 drops 
distilled 
water 
(1:5)

60 drops 
distilled 
water (1:10)

Cyan

3 drops 
cyan dye 
plus 
distilled 
water

15 drops 
distilled 
water 
(1:5)

30 drops 
distilled 
water 
(1:10)

60 drops 
distilled 
water (1:20)