EP0866363A1 - Highly sensitive colour photograph recording material with increased sensitivity in the red spectral region - Google Patents

Abstract

In fast colour photographic material with red-sensitive (RS), green-sensitive (GS) and blue-sensitive (BS) silver halide (AgX) emulsion units containing cyan, magenta and yellow couplers respectively and optionally light-insensitive layer(s), the RS unit consists of NOTLESS 2 layers sensitised with sensitising dyes giving a sensitivity curve characterised by the following parameters : 635 nm ≤ lambda (Smax) ≤ 660 nm; b80 ≥ 35 nm; b50 ≥ 56 nm; b20 ≥ 96 nm; in which lambda (Smax) = the wavelength of the sensitivity curve maximum (100% intensity); b80. b50, b20 = the width of the sensitivity curve at 80, 50 and 20% respectively of the maximum intensity.

Description

The invention relates to a color photographic recording material by a special Sensitization an increased sensitivity to light from the red spectral range having.

The red-sensitive layer package is usually used in color negative films (CN film) so sensitized that the sensitization maximum is about 650 nm and the flanks the sensitization band towards shorter and longer hamlets in particular to the green spectral range, drop steeply. The sensitization curve of a typical CN film is shown in FIG. 1. In this way, good color separation and achieved a high brilliance of the CN film.

There have always been attempts to increase the sensitivity or the color rendering improve. In EP-A-0 409 019 e.g. a color photographic recording material with described improved color rendering, which is achieved in that, for example both the green sensitive and red sensitive silver halide emulsion layers by using one or more so-called gap sensitizing dyes additional sensitization to light from the gap between two neighboring main spectral ranges, in the present case between green and red (580 - 620 nm). This will make the adjacent spectral sensitivity curves raised in the area of the subspectral sensitivity (gap), so that when exposed in this area requires a maximum of 0.6 logarithmic exposure units, by the same color density as in the area of the neighboring main spectral sensitivity to create.

In addition, there have been repeated attempts to increase the sensitivity of the red-sensitive Increase layers through long-wave shift of the sensitization band. The but led to a deterioration in color rendering in all cases, especially the colors delphinium and purple have been shifted to red.

It has now been found that the sensitivity of the red-sensitive layer package can be increased without disadvantages for the color rendering in that the sensitization band in the area of the main spectral absorption red (λ> 620 nm) in all sub-layers of the red-sensitive layer package symmetrical i.e. towards both larger ones as well as smaller wavelengths.

635 nm ≤ λ(S_max) ≤ 660 nm

b₈₀ ≥ 35 nm

b₅₀ ≥ 56 nm

b₂₀ ≥ 96 nm,

worin bedeuten:

λ(S_max)

Wellenlänge des Sensibilisierungsmaximums (100 % Intensität);

b₈₀

Breite der Sensibilisierungsbande bei 80 % der maximalen Intensität;

b₅₀

Breite der Sensibilisierungsbande bei 50 % der maximalen Intensität;

b₂₀

Breite der Sensibilisierungsbande bei 20 % der maximalen Intensität;

The invention relates to a highly sensitive color photographic recording material having at least one red-sensitive silver halide emulsion layer unit which is associated with a cyan coupler, at least one green-sensitive silver halide emulsion layer unit which is associated with a magenta coupler, at least one blue-sensitive silver halide emulsion layer unit which is associated with a yellow coupler and, if appropriate, further non-light-sensitive layers characterized in that the red-sensitive silver halide emulsion layer unit comprises at least two red-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitization band characterized by the following parameters results:

635 nm ≤ λ (S _max ) ≤ 660 nm

b ₈₀ ≥ 35 nm

b ₅₀ ≥ 56 nm

b ₂₀ ≥ 96 nm,

in which mean:

λ (S _max )

Wavelength of the sensitization maximum (100% intensity);

b ₈₀

Width of the sensitization band at 80% of the maximum intensity;

b ₅₀

Width of the sensitization band at 50% of the maximum intensity;

b ₂₀

Width of the sensitization band at 20% of the maximum intensity;

b₈₀: 70 nm

b₅₀: 95 nm

b₂₀: 145 nm.

It is expedient to ensure that the sensitization band does not become as wide as possible in order to avoid excessive overlap of adjacent sensitization bands. It is therefore beneficial for the color rendering quality if the width of the sensitization band does not exceed the following values:

b ₈₀ : 70 nm

b ₅₀ : 95 nm

b ₂₀ : 145 nm.

b₈₀ ≥ 49 nm

b₅₀ ≥ 71 nm

b₂₀ ≥ 111 nm.

In a preferred embodiment of the invention

b ₈₀ ≥ 49 nm

b ₅₀ ≥ 71 nm

b ₂₀ ≥ 111 nm.

70 nm ≥ b₈₀ ≥ 65 nm

95 nm ≥ b₅₀ ≥ 89 nm

145 nm ≥ b₂₀ ≥ 130 nm.

In a still further preferred embodiment of the invention

70 nm ≥ b ₈₀ ≥ 65 nm

95 nm ≥ b ₅₀ ≥ 89 nm

145 nm ≥ b ₂₀ ≥ 130 nm.

Rot") sowohl ein Sensiblisierungsfarbstoff mit kurzwellig verschobenem Sensibilisierungsmaximum ( Kurzrot") als auch ein Sensiblisierungsfarbstoff mit langwellig verschobenem Sensibilisierungsmaximum ( Langrot") beigemischt sein und der Anteil der letztgenannten Farbstoffe im Gemisch kann entsprechend erhöht sein, um eine erfindungsgemäß verbreiterte Sensibilisierungsbande einzustellen. Die gleiche Maßnahme wird man zweckmäßigerweise für alle Teilschichten der rotempfindlichen Silberhalogenidemulsionsschichteneinheit anwenden, wenn auch die in den verschiedenen Teilschichten verwendeten Farbstoffe und/oder deren Mischungsverhältnisse nicht übereinzustimmen brauchen.The setting of the sensitization band characterized according to the invention is achieved, for example, by starting with the sensitization of the layers in question from a mixture of sensitizing dyes, at least one of which has a sensitization maximum in the range of the main spectral sensitivity, while one or more other sensitizing dyes of the mixture have a sensitization maximum, which is shifted slightly towards shorter and / or longer wavelengths compared to the sensitization maximum of the first-mentioned sensitizing dye, and that the proportion of the latter sensitizing dyes in the mixture is increased accordingly. In the present case, for example, a conventional red sensitizing dye (

Red ") both a sensitizing dye with a short-wavelength shifted sensitization maximum ( Kurzrot ") as well as a sensitizing dye with long-shifted sensitization maximum ( Long red ") and the proportion of the latter dyes in the mixture can be increased accordingly in order to set a sensitization band broadened according to the invention. The same measure is expediently used for all sub-layers of the red-sensitive silver halide emulsion layer unit, even if the dyes and / used in the various sub-layers or their mixing ratios do not need to match.

The silver halide emulsions are sensitized in the usual way. The Sensitizing dyes can be mixed simultaneously or individually in succession Silver halide emulsion can be added. The addition of one or more sensitizing dyes already during the grain growth phase and / or during the chemical ripening is possible.

Examples of color photographic recording materials are, in particular, color negative films, and color reversal films. An overview of typical color photographic materials as well as preferred embodiments and processing processes can be found in Research Disclosure 37038 (February 1995).

The photographic materials consist of a support on which at least one photosensitive Silver halide emulsion layer is applied. Are particularly suitable as carriers thin films and foils. An overview of carrier materials and on their Auxiliary layers applied to the front and back are in Research Disclosure 37254, part 1 (1995), p. 285.

The color photographic materials usually contain at least one red-sensitive, green-sensitive and blue-sensitive silver halide emulsion layer and optionally Intermediate layers and layers of protection.

Color photographic films such as color negative films and color reversal films show in the following specified order on the carrier 2 or 3 rotemplindliche, teal-green domes Silver halide emulsion layers, 2 or 3 green sensitive, purple coupling Silver halide emulsion layers and 2 or 3 blue-sensitive, yellow-coupling silver halide emulsion layers on differentiate the layers of the same spectral sensitivity themselves in their photographic sensitivity, being the less sensitive Sub-layers are usually arranged closer to the carrier than the more sensitive ones Sub-layers.

There is usually one between the green-sensitive and blue-sensitive layers Yellow filter layer attached, which prevents blue light from penetrating into the one below Layers.

The possibilities of different layer arrangements and their effects the photographic properties are described in J. Inf. Rec. Mats., 1994, Vol. 22, pages 183 - 193.

Deviations in the number and arrangement of the light-sensitive layers can lead to Achieve certain results. For example, all can be highly sensitive Layers to form a layer package and all low-sensitivity layers another layer package can be summarized in a photographic film in order to Increase sensitivity (DE-A-25 30 645).

Essential components of the photographic emulsion layers are binders, silver halide grains and color coupler.

Information on suitable binders can be found in Research Disclosure 37254, Part 2 (1995), p. 286.

Information about suitable silver halide emulsions, their preparation, maturation, stabilization and spectral sensitization including suitable spectral sensitizers Research Disclosure 36544 (Sept. 1994) and Research Disclosure 37254, Part 3 (1995), p. 286 and in Research Disclosure 37038, Part XV (1995), p. 89.

Photographic materials with camera sensitivity usually contain silver bromoiodide emulsions, which may also contain small amounts of silver chloride can. Photographic copying materials contain either silver chloride bromide emulsions with up to 80 mol% AgBr or silver chloride bromide emulsions with over 95 mol% AgCl.

Information on the color couplers can be found in Research Disclosure 37254, Part 4 (1995), p. 288 and in Research Disclosure 37038, Part II (1995), p. 80. The maximum absorption the dyes formed from the couplers and the color developer oxidation product is preferably in the following ranges: yellow coupler 430 to 460 nm, magenta coupler 540 to 560 nm, cyan couplers 630 to 700 nm. The color couplers are the relevant ones Silver halide emulsion layer units or their sub-layers spatially and spectrally assigned.

Spatial assignment is to be understood to mean that the color coupler is in such a way spatial relationship to the silver halide layer in question is that a Interaction between them is possible, which is a pictorial agreement between the silver image formed during development and that from the color coupler color image generated. This is usually achieved by the color coupler in the silver halide emulsion layer itself or in an adjacent one possibly non-photosensitive binder layer.

Spectral assignment is understood to mean that the spectral sensitivity of the concerned photosensitive silver halide emulsion and the color of the spatially assigned color coupler generated partial color image in a certain relationship to each other stand, whereby the spectral sensitivity of each individual color separation (red, Green, blue) is assigned a complementary colored partial color image (cyan, magenta, yellow) is.

Color photographic films are used to improve sensitivity, graininess, Sharpness and color separation are often used when reacting with the compounds Developer oxidation product release compounds that are photographically active, e.g. DIR couplers that release a development inhibitor.

Information on such compounds, in particular couplers, can be found in Research Disclosure 37254, Part 5 (1995), p. 290 and in Research Disclosure 37038, Part XIV (1995), p. 86.

The mostly hydrophobic color coupler, but also other hydrophobic components of the Layers are usually dissolved in high-boiling organic solvents or dispersed. These solutions or dispersions are then in an aqueous binder solution (usually gelatin solution) emulsified and lie after drying of the layers as fine droplets (0.05 to 0.8 mm diameter) in the layers.

Suitable high-boiling organic solvents, methods for incorporation into the Layers of photographic material and other methods, chemical compounds to be incorporated into photographic layers can be found in Research Disclosure 37254, Part 6 (1995), p. 292.

The usually arranged between layers of different spectral sensitivity non-photosensitive interlayers may contain agents that are undesirable Diffusion of developer oxidation products from a photosensitive in prevent another light-sensitive layer with different spectral sensitization.

Suitable connections (white coupler, scavenger or EOP catcher) can be found in Research Disclosure 37254, Part 7 (1995), p. 292 and in Research Disclosure 37038, Part III (1995), p. 84.

The photographic material can also contain UV light-absorbing compounds, whiteners, spacers, filter dyes, formalin scavengers, light stabilizers, antioxidants, D _min dyes, additives to improve the stability of dyes, couplers and whites and to reduce the color fog, plasticizers (latices), Contain biocides and others.

Suitable compounds can be found in Research Disclosure 37254, Part 8 (1995), p. 292 and in Research Disclosure 37038, Parts IV, V, VI, VII, X, XI and XIII (1995), p. 84 ff.

The layers of color photographic materials are usually hardened, i.e. the one used Binder, preferably gelatin, is made by suitable chemical methods networked.

Suitable hardener substances can be found in Research Disclosure 37254, Part 9 (1995), p. 294 and in Research Disclosure 37038, Part XII (1995), page 86.

After image-wise exposure, color photographic materials become in accordance with their character processed according to different processes. Procedural details and chemicals required for this are in Research Disclosure 37254, Part 10 (1995), p. 294 and in Research Disclosure 37038, parts XVI to XXIII (1995), p. 95 ff. published together with exemplary materials.

example 1

A color photographic recording material for color negative color development was produced (layer structure 1 - comparison) by applying the following layers in the order given to a transparent cellulose triacetate support. The quantities given relate to 1 m ² . The corresponding amounts of AgNO ₃ are given for the silver halide application. All silver halide emulsions were stabilized per 1 mol AgNO ₃ with 0.5 g 4-hydroxy-6-methyl-1,3,3a, 7-tetraazaindene.

Layer structure 1

Layer 1:

(Antihalation layer)
black colloidal silver sol with

0.3 g Ag

1.2 g gelatin

0.4 g UV absorber XUV-1

0.02 g tricresyl phosphate (CPM)

Layer 2:

(Intermediate layer)

1.0 g gelatin

Layer 3:

(1st red-sensitized layer, slightly sensitive)
red-sensitized silver bromide iodide emulsion (4 mol% iodide; average grain diameter 0.5 µm; spectrally sensitized with the sensitizing dyes XRS-1, XRS-2 and XRS-3 in a ratio of 1: 3: 0.5) from 2.7 g AgNO ₃ , With

2.0 g gelatin

0.88 g cyan coupler XC-1

0.05 g colored coupler XCR-1

0.07 g colored coupler XCY-1

0.02 g DIR coupler XDIR-1

0.75 g CPM

Layer 4:

(2nd red-sensitized layer, highly sensitive)
Red-sensitized silver bromide iodide emulsion (12 mol% iodide; average grain diameter 1.0 µm; spectrally sensitized with the sensitizing dyes XRS-1, XRS-2 and XRS-3 in a ratio of 1: 3.1: 0.3) from 2.2 g AgNO ₃ , with

1.8 g gelatin

0.19 g cyan coupler XC-2

0.17 g CPM

Layer 5:

(Intermediate layer)

0.4 g gelatin

0.15 g white coupler XW-1

0.06 g of aluminum salt of aurintricarboxylic acid

Layer 6:

(1st green-sensitized layer, slightly sensitive)
Green-sensitized silver bromide iodide emulsion (4 mol% iodide; average grain diameter 0.35 µm; spectrally sensitized with the sensitizing dyes XGS-1, XGS-2 and XGS-3 in a ratio of 2.8: 1: 0.2) from 1.9 g AgNO ₃ , with

1.8 g gelatin

0.54 g XM-1 magenta coupler

0.065 g colored coupler XMY-1

0.24 g DIR coupler XDIR-1

0.6 g CPM

Layer 7:

(2nd green sensitive layer, highly sensitive)
Green-sensitized silver bromide iodide emulsion (9 mol% iodide; average grain diameter 0.8 µm; spectrally sensitized with the sensitizing dyes XGS-1, XGS-2 and XGS-3 in the ratio 2.8: 0.9: 0.25) from 1.25 g AgNO ₃ , with

1.1 g gelatin

0.195 g magenta coupler XM-2

0.05 g colored coupler XMY-2

0.245 g CPM

Layer 8:

(Yellow filter layer)
yellow colloidal silver sol with

0.09 g Ag

0.25 g gelatin

0.08 g Scavenger XSC-1

0.40 g formaldehyde scavenger XFF-1

0.08 g CPM

Layer 9:

(1st blue-sensitive layer, slightly sensitive)
Blue-sensitized silver bromide iodide emulsion (6 mol% iodide; average grain diameter 0.6 µm; spectrally sensitized with the sensitizing dye XBS-1) from 0.9 g AgNO ₃ , with

2.2 g gelatin

1.1 g yellow coupler XY-1

0.037 g DIR coupler XDIR-1

1.14 g CPM

Layer 10:

(2nd blue sensitive layer, highly sensitive)
Blue-sensitized silver bromide iodide emulsion (10 mol% iodide; average grain diameter 1.2 µm; spectrally sensitized with the sensitizing dye XBS-1) from 0.6 g AgNO ₃ , with

0.6 g gelatin

0.2 g yellow coupler XY-1

0.003 g DIR coupler XDIR-1

0.22 g CPM

Layer 11:

(Micrate layer)
Mikrat-silver bromide iodide emulsion (0.5 mol% iodide: average grain diameter 0.06 µm) from 0.06 g AgNO ₃ , with

1.0 g gelatin

0.3 g XUV-2 UV absorber

0.3 g CPM

Layer 12:

(Protective and hardening layer)

0.25 g gelatin

0.75 g hardener XH-1,
so that the total layer structure had a swelling factor of 3.5 after curing.

Connections used in layer structure 1:

Sensitizing dyes used in layer structure 1:

After exposing a gray wedge, the material is processed using a color negative development process, which is carried out in The British Journal of Photography ", 1974, pages 597 and 198.

With the test film produced in this way, the sensitivity distribution shown in FIG. 2 results.

To characterize this and the sensitization variants according to the invention described below, the sensitivity maximum and the width of the sensitivity distribution [red] at 80%, 50% and 20%, based on the maximum intensity of the sensitization band, are also used (b ₈₀ , b ₅₀ , b ₂₀ ). For the comparative example, the values shown in Table 1, line 1 (comparison) result. Table 1 also shows the corresponding values (b ₈₀ , b ₅₀ , b ₂₀ , and sensitivity increase achieved) for the layer structures 2-6 described in the examples below. Example (layer structure) Width of the sensitivity distribution [nm] Sensitivity increase [%] red b ₈₀ b ₅₀ b ₂₀ 1 comparison 22 43 82 - 2 invention 35 56 96 30th 3 Invention 35 57 98 30th 4 Invention 49 71 111 60 5 Invention 50 72 113 60 6 Invention 65 89 130 100

CIELAB measurements are usually used for the colorimetric description of CN films. The method is detailed, for example in RWG Hunt The Reproduction of Color ", Fountain Press (1988). The color reproduction is characterized by means of the luminance L and the chromaticity constants a and b. With the aid of these variables, color differences ΔE can be determined, the statements about a change in the color saturation or the color shift Experience has shown that a shift of 3-5 ΔE units is perceptible to the human eye.

Table 2 shows the colorimetric characterization for layer structure 1 (comparison film) and in FIG. 3 the graphical representation of the chromaticity constants a and b specified.

For the experimental films according to the invention described in the following examples the colorimetric description will only be in tabular form, with the Color distances ΔE can be selected for characterization.

Farbmetrische Charakterisierung des Vergleichsfilms (Schichtaufbau 1) Nr. Farbe Name L a b 1 DS dark skin 36.9 29.1 22.8 2 Ha light skin 72.8 14.4 19.3 3 Hi blue sky 50.1 -16.2 -24.7 4 Pf foliage 35.4 -11.4 14.7 5 Bf blue flower 65.5 11.0 -17.0 6 BG bluish green 71.8 -24.0 -11.0 7 O orange 58.0 30.9 59.2 8 PB purphlish blue 35.5 -0.3 -36.5 9 MR moderate red 44.3 45.0 19.3 10 P purple 28.8 26.9 -10.3 11 YG yellow green 71.6 1.4 60.0 12 OY orange yellow 70.2 17.0 67.8 13 B blue 21.3 6.1 -39.4 14 G green 43.8 -36.3 19.9 15 R red 33.3 50.2 32.6 16 Y yellow 73.4 13.7 76.6 17 M magenta 48.7 46.9 -8.6 18 C cyan 45.1 -31.7 -27.8 19 Grau_0.05 white 89.1 1.0 -3.2 20 Grau_0.2 neutral 8 84.5 0.8 -1.8 21 Grau_0.4 neutral 6.5 73.5 0.7 0.0 22 Grau_0.7 neutral 5 49.7 0.2 -0.4 23 Grau_1.05 neutral 3.5 24.0 -2.0 -3.4 24 Grau_1.5 black 8.5 -0.4 -4.5 In addition to the sensitizing dyes already mentioned, the following were used:

Colorimetric characterization of the comparison film (layer structure 1) No. colour Surname L a b 1 DS dark skin 36.9 29.1 22.8 2nd Ha light skin 72.8 14.4 19.3 3rd Hi blue sky 50.1 -16.2 -24.7 4th Pf foliage 35.4 -11.4 14.7 5 Bf blue flower 65.5 11.0 -17.0 6 BG bluish green 71.8 -24.0 -11.0 7 O orange 58.0 30.9 59.2 8th PB purphlish blue 35.5 -0.3 -36.5 9 MR moderate red 44.3 45.0 19.3 10th P purple 28.8 26.9 -10.3 11 YG yellow green 71.6 1.4 60.0 12th OY orange yellow 70.2 17.0 67.8 13 B blue 21.3 6.1 -39.4 14 G green 43.8 -36.3 19.9 15 R red 33.3 50.2 32.6 16 Y yellow 73.4 13.7 76.6 17th M magenta 48.7 46.9 -8.6 18th C. cyan 45.1 -31.7 -27.8 19th Gray_0.05 white 89.1 1.0 -3.2 20th Gray_0.2 neutral 8 84.5 0.8 -1.8 21 Gray_0.4 neutral 6.5 73.5 0.7 0.0 22 Gray_0.7 neutral 5 49.7 0.2 -0.4 23 Grau_1.05 neutral 3.5 24.0 -2.0 -3.4 24th Gray_1.5 black 8.5 -0.4 -4.5

The shift in color rendering compared to layer structure 1 described with the layer structures 2-6 described in the examples below is shown in Table 3. Shift in color rendering compared to layer structure 1 (color difference ΔE) Color difference [ΔE] compared to layer structure 1 Layer structure 2nd 3rd 4th 5 6 No. colour 1 DS 0.2 0.2 0.6 0.6 1.2 2nd Ha 0.1 0.1 0.4 0.3 0.7 3rd Hi 0.2 0.2 0.5 0.5 1.0 4th Pf 0.1 0.0 0.4 0.4 1.2 5 Bf 0.3 0.3 0.7 0.7 0.9 6 BG 0.5 0.6 1.1 1.0 1.9 7 O 0.1 0.2 0.3 0.2 0.5 8th PB 0.0 0.0 0.1 0.1 0.4 9 MR 0.2 0.2 0.5 0.5 0.9 10th P 0.4 0.4 0.7 0.7 1.4 11 YG 0.2 0.2 0.4 0.4 0.6 12th OY 0.0 0.0 0.2 0.3 0.4 13 B 0.1 0.1 0.2 0.2 0.3 14 G 0.6 0.7 1.6 1.4 2.9 15 R 0.0 0.0 0.1 0.0 0.3 16 Y 0.0 0.0 0.1 0.0 0.3 17th M 0.3 0.3 0.6 0.6 1.0 18th C. 0.1 0.1 0.1 0.1 0.3 19th Gray_0.05 0.0 0.0 0.1 0.1 0.3 20th Gray_0.2 0.1 0.1 0.3 0.2 0.7 21 Gray_0.4 0.3 0.3 0.8 0.9 1.6 22 Gray_0.7 0.4 0.5 1.2 1.2 2.2 23 Grau_1.05 0.2 0.2 0.6 0.6 1.2 24th Gray_1.5 0.0 0.0 0.1 0.1 0.2

Example 2

In the layer structure 2 according to the invention, the spectral sensitization of the red-sensitive layer package was carried out as follows: layer dyes used Mixing ratio 3rd XRS-4, XRS-5, XRS-3 1: 2: 0.34 4th XRS-4, XRS-5, XRS-3 1: 2: 0.3

With this sensitization, the sensitivity to the comparison type increased by approx. 30%.

The description of the sensitivity distribution (Table 1, Fig. 4) shows the symmetrical Broadening of the sensitization band, especially in the area of the main spectral sensitivity.

The colorimetric description (Table 3) shows that only minor in this way and no image-effective changes in the color rendering result.

Example 3

In the layer structure 3 according to the invention, the spectral sensitization of the red-sensitive layer package was carried out as follows: layer dyes used Mixing ratio 3rd XGS-3, XRS-5, XRS-3 1: 2: 0.30 4th XGS-3, XRS-5, XRS-3 1: 2: 0.35

With this sensitization, the sensitivity to the comparison type increased by approx. 30%.

The description of the sensitivity distribution (Table 1) shows the symmetrical one Broadening of the awareness fire, especially in the area of main spectral sensitivity.

The colorimetric description (Table 3) shows that only minor in this way and no image-effective changes in the color rendering result.

Example 4

In the layer structure 4 according to the invention, the spectral sensitization of the red-sensitive layer package was carried out as follows: layer dyes used Mixing ratio 3rd XGS-2, XGS-3, XRS-2, XRS-3 0.2: 1.1: 1.9: 0.30 4th XGS-2, XGS-3, XRS-2, XRS-3 0.2: 1.2: 1.9: 0.30

With this sensitization, the sensitivity to the comparison type increased by approx. 60%.

The description of the sensitivity distribution (Table 1) shows the symmetrical one Broadening of the sensitization band, especially in the area of the main spectral sensitivity.

The colorimetric description (Table 3) shows that only minor in this way and no image-effective changes in the color rendering result.

Example 5

In the layer structure 5 according to the invention, the spectral sensitization of the red-sensitive layer package was carried out as follows: layer dyes used Mixing ratio 3rd XGS-3, XRS-5, XRS-3 2.0: 1.0: 0.9 4th XGS-3, XRS-5, XRS-3 2.0: 1.1: 0.85

With this sensitization, the sensitivity to the comparison type increased by approx. 60%.

The description of the sensitivity distribution (Table 1) shows the symmetrical one Broadening of the sensitization band, especially in the area of the main spectral sensitivity.

The colorimetric description (Table 3) shows that only minor in this way and no image-effective changes in the color rendering result.

Example 6

In the layer structure 6 according to the invention, the spectral sensitization of the red-sensitive layer package was carried out as follows: layer dyes used Mixing ratio 3rd XGS-2, XGS-3, XRS-5, XRS-3 0.2: 1.5: 1.5: 0.6 4th XGS-2, XGS-3, XRS-5, XRS-3 0.2: 1.5: 1.5: 0.6

With this sensitization, the sensitivity to the comparison type is around approx. 100% increased.

The description of the sensitivity distribution (Table 1) shows the symmetrical one Broadening of the sensitization band, especially in the area of the main spectral sensitivity.

The colorimetric description (Table 3) shows that only minor in this way Changes in the color rendering result.

Claims (3)

Highly sensitive color photographic recording material with at least one red-sensitive silver halide emulsion layer unit to which a cyan coupler is assigned, at least one green-sensitive silver halide emulsion layer unit to which a magenta coupler is assigned, at least one blue-sensitive silver halide emulsion layer unit to which a yellow coupler is assigned, and optionally further non-light-sensitive layers, characterized in that the red-sensitive silver halide emulsion layer unit comprises at least two red-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitization band characterized by the following parameters results: 635 nm ≤ λ (S _max ) ≤ 660 nm b ₈₀ ≥ 35 nm b ₅₀ ≥ 56 nm b ₂₀ ≥ 96 nm, in which mean:

λ (S _max )

Wavelength of the sensitization maximum (100% intensity);

b ₈₀

Width of the sensitization band at 80% of the maximum intensity;

b ₅₀

Width of the sensitization band at 50% of the maximum intensity;

b ₂₀

Width of the sensitization band at 20% of the maximum intensity;

Recording material according to claim 1, characterized in that the partial layers of the red-sensitive silver halide emulsion layer unit are sensitized with sensitizing dyes in such a way that a sensitization band characterized by the following parameters results: b ₈₀ ≥ 49 nm b ₅₀ ≥ 71 nm b ₂₀ ≥ 111 nm. Recording material according to claim 1, characterized in that the partial layers of the red-sensitive silver halide emulsion layer unit are sensitized with sensitizing dyes in such a way that a sensitization band characterized by the following parameters results: 70 nm ≥ b ₈₀ ≥ 65 nm 95 nm ≥ b ₅₀ ≥ 89 nm 145 nm ≥ b ₂₀ ≥ 130 nm.

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