Kodak P-255 manual Printing, IMAGE-STRUCTURE Characteristics, Spectral-Sensitivity Curves

KODAK DURAFLO RT Developer Replenisher

KODAK DURAFLO RT Developer Starter

KODAK Rapid Fixer

Processing Sequence

Step	No. of	Path	Temperature
	Racks	Length
Develop	1	8 ft (2.4 m)	80 ±0.5°F
			(27 ±0.3°C)
Fix	3	12 ft (3.8 m)	80°F (27°C)
			nominal
Wash	2	8 ft (2.4 m)	70 to 75°F
			(21 to 24°C)
Dry	—	8 ft (2.4 m)	135 to 140°F*
			(57 to 60°C)

To produce a contrast index of about 1.4, start with a machine speed of 8 feet per minute (2.4 m/min). Washing at this speed will not provide archival quality, but it should be adequate for many scientific recording applications.

*Use a lower dryer temperature (95 to 110°F or 35 to 44°C) with 2415 Film if spots form due to rapid drying. Lower temperatures may also be adequate if you are drying only roll film.

PRINTING

The 0.1 neutral density built into the ESTAR-AH Base is one-half to one-third that found in conventional 35 mm picture-taking films. Correctly exposed and processed pictorial negatives may appear to be “thinner” than normal. It is important to take this into account when you judge the printability of negatives.

The micro-fine grain of Technical Pan Film makes possible printing at higher magnifications than are usually acceptable with conventional picture-taking films. Enlargements made at magnifications greater than 25X with highly specular (point-source) enlargers may show a random distribution of poorly defined white specks in otherwise dense areas. The specks are caused by tiny matte particles coated on the back surface of the film. You can mask the specks, with little loss in the overall sharpness of the image, by using an enlarger with a diffuse or semi-diffuse light source.

IMAGE-STRUCTURE CHARACTERISTICS

The data in this section are based on development at

68°F (20°C) in KODAK HC-110 Developer (Dilution D) for 8 minutes or KODAK TECHNIDOL Liquid Developer for 9 minutes.

	KODAK Developer
	HC-110 (Dilution D)	TECHNIDOL Liquid
Diffuse rms
	8 Extremely fine	5 Micro fine
Granularity*

*Read at a net diffuse density of 1.0 using a 48-micrometre aperture and 12X magnification.

			Spectral-Sensitivity Curves
	3.0
		Effective Exposure: 1.4 sec visible, 0.2 sec ultraviolet
		Process: KODAK HC-110 Developer (Dil D),
		8 minutes at 68 F (20 C)
	2.0
*
SENSITIVITYLOG				Diffuse Density=
				0.3 above D-min
	1.0
	0.0				Diffuse Density=
					1.0 above D-min
	1.0
	250	300	350	400	450	500	550	600	650	700	750

WAVELENGTH (nm)

F002_0194AC			*Sensitivity = reciprocal of exposure (erg/cm2 ) required
						to produce specified density
				Modulation-Transfer Curves
	200
	100
	70
	50
(%)	30
	20	Exposure: Tungsten
RESPONSE	5
		Process: Small tank,
	10
					KODAK HC-110 Developer (Dil D),
	7				8 minutes at 68 F (20 C);
					KODAK TECHNIDOL Liquid Developer,
					8 minutes at 68 F (20 C);
	3
	2
	1
		1	2	3	4 5	10	20	50	100	200	600
					SPATIAL FREQUENCY (cycles/mm)

F002_0180AC

NOTICE: The sensitometric curves and data in this publication represent product tested under the conditions of exposure and processing specified. They are representative of production coatings, and therefore do not apply directly to a particular box or roll of photographic material. They do not represent standards or specifications that must be met by Eastman Kodak Company. The company reserves the right to change and improve product characteristics at any time.

KODAK PROFESSIONAL Technical Pan Film • P-255 9