US5674665A — Low contrast film

Claim 1

Independent Claim 247 words

In a packaged, unexposed silver halide color negative photographic film comprising red, green and blue color sensitive records, having Film Speed and standard commercial ECN-2 processing conditions indicated with the film or its packaging, the improvement wherein on the characteristic curve of status M density versus log E for each color sensitive record which results from normal exposure of the film through a step wedge, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card, and processing with the sequential standard ECN-2 processing steps of Pre-bath (10 sec), Remjet Removal (20 sec), Developer (3 min), Stop Bath (30 sec), Wash (30 sec), UL Bleach (3 min), Wash (1 min), Fix (2 min), Wash (2 min), and Final Rinse (10 sec): (1) a straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.60; and (2) the difference in log E is ≧1.5 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2; and (3) the difference in log E is ≧1.20 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 2

Dependent Claim 247 words

In a packaged, unexposed silver halide color negative photographic film comprising red, green and blue color sensitive records, having Film Speed and standard commercial ECN-2 processing conditions indicated with the film or its packaging, the improvement wherein on the characteristic curve of status M density versus log E for each color sensitive record which results from normal exposure of the film through a step wedge, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card, and processing with the sequential standard ECN-2 processing steps of Pre-bath (10 sec), Remjet Removal (20 sec), Developer (3 min), Stop Bath (30 sec), Wash (30 sec), UL Bleach (3 min), Wash (1 min), Fix (2 min), Wash (2 min), and Final Rinse (10 sec): (1) a straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.60; and (2) the difference in log E is ≧1.5 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2; and (3) the difference in log E is ≧1.20 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 3

Dependent Claim 39 words

An unexposed color negative photographic film according to claim 1 wherein the straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.55.

Claim 4

Dependent Claim 74 words

An unexposed color negative photographic film according to claim 2 wherein the difference in log E is ≧1.6 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2.

Claim 5

Dependent Claim 39 words

An unexposed color negative photographic film according to claim 3 wherein the straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.50.

Claim 6

Dependent Claim 249 words

In a packaged, unexposed silver halide motion picture color negative photographic film comprising red, green and blue color sensitive records, having Film Speed and standard commercial ECN-2 processing conditions indicated with the film or its packaging, the improvement wherein on the characteristic curve of status M density versus log E for each color sensitive record which results from normal exposure of the film through a step wedge, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card, and processing with the sequential standard ECN-2 processing steps of Pre-bath (10 sec), Remjet Removal (20 sec), Developer (3 min), Stop Bath (30 sec), Wash (30 sec), UL Bleach (3 min), Wash (1 min), Fix (2 min), Wash (2 min), and Final Rinse (10 sec): (1) a straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.50; and (2) the difference in log E is ≧1.7 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2; and (3) the difference in log E is ≧1.20 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 7

Dependent Claim 249 words

In a packaged, unexposed silver halide motion picture color negative photographic film comprising red, green and blue color sensitive records, having Film Speed and standard commercial ECN-2 processing conditions indicated with the film or its packaging, the improvement wherein on the characteristic curve of status M density versus log E for each color sensitive record which results from normal exposure of the film through a step wedge, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card, and processing with the sequential standard ECN-2 processing steps of Pre-bath (10 sec), Remjet Removal (20 sec), Developer (3 min), Stop Bath (30 sec), Wash (30 sec), UL Bleach (3 min), Wash (1 min), Fix (2 min), Wash (2 min), and Final Rinse (10 sec): (1) a straight line, which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.50; and (2) the difference in log E is ≧1.7 between the point 0.9log E above the exposure required for density Dmin+0.2 and the point where the density difference is 0.1 between the curve and the straight line which results from a linear regression of the three density points at exposures 0.3log E, 0.9log E, and 1.5log E above the exposure required for the density Dmin+0.2; and (3) the difference in log E is ≧1.20 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 8

Dependent Claim 51 words

An unexposed motion picture film according to claim 5 wherein on the curve of density versus log E for each color sensitive record, the straight line which connects the point at density Dmin+0.1 and the point at 1.5log E above the exposure required for density Dmin+0.2, has a mathematical slope ≦0.45.

Claim 9

Dependent Claim 37 words

An unexposed motion picture film according to claim 5 wherein the difference in log E is ≧1.30 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 10

Dependent Claim 37 words

An unexposed motion picture film according to claim 5 wherein the difference in log E is ≧1.40 between the exposure needed for density Dmin+0.1 and the point that corresponds to the exposure, in lux-seconds, of 9.2/(Film Speed).

Claim 11

Dependent Claim 45 words

A method of exposing the film of claim 1 comprising imagewise exposing the film with a normal exposure according to the Film Speed value indicated with the film or its packaging, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card.

Claim 12

Dependent Claim 24 words

A method according to claim 9 additionally comprising, following imagewise exposure, processing the film without under development according to standard ECN-2 commercial processing conditions.

Claim 13

Dependent Claim 16 words

A method according to claim 10, wherein the film is not uniformly exposed prior to processing.

Claim 14

Dependent Claim 69 words

A method of exposing and processing the film of claim 5 comprising imagewise exposing the film with a normal exposure according to the Film Speed value indicated with the film or its packaging, wherein an exposure of 9.2/(Film Speed) lux-seconds is generated for an 18% gray card, then processing the film without under development according to standard ECN-2 commercial processing conditions without uniformly exposing the film prior to processing.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2000-10-06	2001-04-07	2001-10-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2004-10-06	2005-04-07	2005-10-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2008-10-06	2009-04-07	2009-10-07	$7700.00	Window Closed / Lapsed

Low contrast film

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag