Kodak Understanding the Characteristics of Internegative Film

Characteristic Curves

4.0

Exposure: Tungsten (2850 K), 1/100 second with KODAK Heat Absorbing Glass, No. 2043, KODAK WRATTEN Gelatin Filter No. 2B

Process: ECN-2

3.0Densitometry: Status M

DENSITY	2.0	B
		G
	1.0	R

0.0
1.0	0.0	1.0	2.0	3.0

F010_0049AC LOG EXPOSURE (lux-seconds)

Spectral-Dye-Density Curves

	2.5
		Typical densities for a midscale neutral subject
		and D-min.
		Process: ECN-2
DENSITY	2.0
	1.5	Midscale Neutral
SPECTRAL
	1.0
DIFFUSE
	0.5	Minimum Density
	0.0

250 350 450 550 650 750

F010_0051AC

WAVELENGTH (nm)

Note: While the data presented are typical of production coatings, they do not represent standards which must be met by Kodak. Varying storage, exposure, and processing conditions will affect results. The company reserves the right to change and improve product characteristics at any time.

Spectral-Sensitivity Curves

	1.0
	0.0			Yellow-
*							Magenta-
SENSITIVITY			Forming
							Forming
				Layer
							Layer
	1.0
LOG									Cyan-
	2.0	Effective Exposure:						Forming
		1.4 second							Layer
		Process: ECN-2
		Density: 1.0 above D-min
	3.0	Densitometry: Status M
	250	300	350	400	450	500	550	600	650	700	750

WAVELENGTH (nm)

*Sensitivity = reciprocal of exposure (ergs/cm2 ) required

to produce specified density

F010_0050AC

		Modulation-Transfer Curves
	200
	100
	70
	50
(%)	30
	20
RESPONSE	5
	10
	7
	3	Exposure: Tungsten
		Process: ECN-2
	2	Densitometry: Diffuse Visual

1

1 2 3 4 5 10 20 50 100 200 600

SPATIAL FREQUENCY (cycles/mm)

F010_0048AC

These photographic modulation-transfer values were determined by using a method similar to the one described in ANSI Standard PH2.39-1977(R1990). The film was exposed with the specified illuminant to spatially varying sinusoidal test patterns having an aerial image modulation of a nominal 60 percent at the image plane, with processing as indicated. In most cases, the photographic modulation-transfer values are influenced by development-adjacency effects and are not equivalent to the true optical modulation-transfer curve of the emulsion layer in the particular photographic product.

EASTMAN Color Internegative II Film 5272™ / 7272™ ∙ H-1-5272 3