EP0866364B1 - Highly sensitive colour photographic recording material with increased sensitiviy in the blue spectral region - Google Patents

Description

The invention relates to a color photographic recording material by a special sensitization an increased sensitivity to light from the blue Has spectral range.

The color-sensitive film is usually used in color negative films (CN film) Layer package so sensitized that the maximum sensitization is about 470 nm and the flank of the sensitization band towards the neighboring green Spectral range drops steeply. The sensitivity curve of a typical CN film is in Fig. 1 reproduced. In this way, good color separation and high Brilliance of the CN film achieved.

There have always been attempts at sensitivity and color rendering to improve. In EP-A-0 409 019 e.g. a color photographic Recording material described with improved color rendering, the result is achieved that, for example, both the green sensitive and the red sensitive silver halide emulsion layers by using one or an additional one of several so-called gap-sensitizing dyes Sensitization to light from the gap between two neighboring ones Main spectral ranges, in the present case between green and red (580 - 620 nm) receive. As a result, the neighboring spectral sensitivity curves in the Range of the subspectral sensitivity (gap) increased so that when exposed in This area requires a maximum of 0.6 logarithmic exposure units are the same color density as in the area of the neighboring Generate main spectral sensitivity.

In addition, there have been repeated attempts to reduce the sensitivity of the blue-sensitive layers due to long-wave displacement of the Increase awareness band. But in all cases this led to one Color rendering deterioration. In particular, the colors yellow, Yellow orange and green shifted to blue and desaturated.

It is known from EP 677 782 that a minimum blue sensitivity below 450 nm leads to better fluorescent light reproduction.

It has now been found that the sensitivity of the blue-sensitive layer package can be increased without disadvantages for the color rendering in that the sensitization band in the range of the main spectral absorption blue (460 - 480 nm) in all Sub-layers of the blue-sensitive layer package symmetrical, i.e. towards both to larger as well as to smaller wavelengths.

λ(S_max)

Wellenlänge des Empfindlichkeitsmaximums (100 % Intensität);

b₈₀

Breite der Empfindlichkeitskurve bei 80 % der maximalen Intensität;

b₅₀

Breite der Empfindlichkeitskurve bei 50 % der maximalen Intensität;

b₂₀

Breite der Empfindlichkeitskurve bei 20 % der maximalen Intensität;

The invention relates to a 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, if appropriate, further non-light-sensitive layers characterized in that the blue-sensitive silver halide emulsion layer unit comprises at least two blue-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitivity curve characterized by the following parameters results: 460 nm ≤ λ (p Max ) ≤ 480 nm b 80 ≥ 24 nm b 50 ≥ 91 nm b 20 ≥ 106 nm, in which mean:

λ (S _max )

Wavelength of the maximum sensitivity (100% intensity);

b ₈₀

Width of the sensitivity curve at 80% of the maximum intensity;

b ₅₀

Width of the sensitivity curve at 50% of the maximum intensity;

b ₂₀

Width of the sensitivity curve at 20% of the maximum intensity;

Because the spectral sensitivity of photographic layers other than spectral sensitization can also depend on the way in which the incident light with respect its spectral distribution modified by absorption processes within the layers e.g. by filter dyes absorbing in the spectral sensitivity range, it is conceptually more correct, instead of a sensitization band and a sensitization maximum the terms "sensitivity curve" and "sensitivity maximum" use. This applies in particular to blue-sensitive layers because of the usual use of UV absorber compounds. For this reason, at the description of the present invention uses the latter terms, if it concerns blue sensitive layers, while in connection with the description of green-sensitive or red-sensitive layers "Sensitization band" and "Sensitization maximum" are maintained.

Advantageously, care will be taken to ensure that the sensitivity curve does not become arbitrarily wide in order to avoid excessive overlap with the adjacent sensitization band of the green-sensitive silver halide emulsion layer unit. It is therefore beneficial for the color rendering quality if the width of the sensitivity curve does not exceed the following values: b 80 : 70 nm b 50 : 145 nm b 20 : 155 nm.

In a preferred embodiment of the invention b 80 ≥ 40 nm b 50 ≥ 107 nm b 20 ≥ 124 nm.

In a still further preferred embodiment of the invention 70 nm ≥ b 80 ≥ 57 nm 145 nm ≥ b 50 ≥ 124 nm 155 nm ≥ b 20 ≥ 137 nm.

The setting of the sensitivity curve characterized according to the invention is achieved, for example, by starting with a mixture of sensitizing dyes for the sensitization of the layers in question, at least one of which has a sensitizing maximum in the range of the main spectral sensitivity, while one or more other sensitizing dyes of the mixture have a sensitizing 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 blue sensitizing dye ("blue") can be admixed with a sensitizing dye with a long-shift shifted sensitization maximum ("long blue") and the proportion of the latter dye in the mixture can be increased accordingly in order to set a sensitization curve widened according to the invention. The same measure is expediently used for all sub-layers of the blue-sensitive silver halide emulsion layer unit, even if the dyes used in the different sub-layers and / or their mixing ratios do not have to match. As a supplementary measure, which is mainly of importance for the broadening of the sensitivity curve blue in the direction of smaller wavelengths, one can ensure that the content of UV absorber compounds with an absorption maximum between 360 and 390 nm in layers arranged above the blue-sensitive silver halide emulsion layer unit is not more than 100 mg / m ^{2 in} total.

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

Grünempfindlichkeit: 540 nm ≤ λ(Smax) ≤ 555 nm 70 nm ≥ b80 ≥ 36 nm 95 nm ≥ b50 ≥ 56 nm 140 nm ≥ b20 ≥ 89 nm.

Rotempfindlichkeit: 635 nm ≤ λ(Smax) ≤ 660 nm 70 nm ≥ b80 ≥ 35 nm 95 nm ≥ b50 ≥ 56 nm 145 nm ≥ b20 ≥ 96 nm.

It is advantageous if not only the blue sensitivity, but also the green sensitivity and / or the red sensitivity is improved, i.e. if the sub-layers of the green-sensitive and / or red-sensitive silver halide emulsion layer unit are sensitized by suitable sensitizing dyes in such a way that a sensitization band results in all their sub-layers , which is characterized by the following parameters:

Green Sensitivity: 540 nm ≤ λ (p Max ) ≤ 555 nm 70 nm ≥ b 80 ≥ 36 nm 95 nm ≥ b 50 ≥ 56 nm 140 nm ≥ b 20 ≥ 89 nm.

red sensitivity: 635 nm ≤ λ (p Max ) ≤ 660 nm 70 nm ≥ b 80 ≥ 35 nm 95 nm ≥ b 50 ≥ 56 nm 145 nm ≥ b 20 ≥ 96 nm.

In further preferred embodiments, the following parameters apply to the partial layers of the red-sensitive silver halide emulsion layer unit: b 80 ≥ 49 nm, and preferably b 80 ≥ 65 nm b 50 ≥ 71 nm, and preferably b 80 ≥ 89 nm b 20 ≥ 111 nm, and preferably b 80 ≥ 130 nm and / or for the sub-layers of the green-sensitive silver halide emulsion layer unit: b 80 ≥ 41 nm, and preferably b 80 ≥ 58 nm b 50 ≥ 68 nm, and preferably b 80 ≥ 85 nm b 20 ≥ 98 nm, and preferably b 80 ≥ 124 nm.

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 suitable as carriers especially thin films and foils. An overview of substrates and on the front and back of the auxiliary layers applied is 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 if necessary, intermediate layers and protective layers.

Color photographic films such as color negative films and color reversal films show in the the sequence given below on the carrier 2 or 3 red-sensitive, cyan-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 the layers of the same spectral sensitivity differ in their photographic sensitivity, with the less sensitive Sub-layers are usually arranged closer to the carrier than the more sensitive ones Partial 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 can be found in Research Disclosure 36544 (September 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 couplers 540 to 560 nm, cyan couplers 630 to 700 nm. The color couplers are the relevant silver halide emulsion layer units or their sub-layers spatially and spectrally assigned.

Spatial assignment is understood to mean that the color coupler is in one such spatial relationship to the silver halide layer in question that an interaction between them is possible that is a pictorial match 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 means that the spectral sensitivity of the relevant light sensitive silver halide emulsion and the color of the from the spatially assigned color couplers generated partial color image in a certain relationship stand with each other, the spectral sensitivity of each individual color separation (Red, green, blue) a complementary partial color image (cyan, magenta, yellow) assigned.

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) emulsifies and lie after drying of the layers as fine droplets (0.05 to 0.8 mm diameter) in the layers in front.

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-light-sensitive intermediate layers can contain agents that have a unwanted diffusion of developer oxidation products from a photosensitive in another light-sensitive layer with different spectral sensitization prevent.

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., that Binder used, preferably gelatin, is replaced by suitable chemical Process 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 photographic exposure, color photographic materials become their character processed according to different processes. Details of the procedures 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 colomegative 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 XUV-1 UV absorber

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 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:

(Mikratschicht)
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 UV absorber XUV-2

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.

Compounds 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 processed in "The British Journal of Photography", 1974, Pages 597 and 198 is described.

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 [blue] 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 the increase in sensitivity achieved) for the layer structures 2-6 described in the examples below. example
(Layer structure) Width of the sensitivity distribution
[Nm] Sensitivity increase [%] blue b ₈₀ b ₅₀ b ₂₀ 1 comparison 10 76 89 - 2 Invention 24 91 106 30 3 Invention 40 107 124 60 4 Invention 39 105 125 60 5 Invention 57 124 137 100

CIELAB measurements are usually used for the colorimetric description of CN films used. The method is detailed, e.g. in R.W.G. Hunt "The Reproduction of Color ", Fountain Press (1988). The color reproduction is described with Characterized by the luminance L and the chromaticity constants a and b. With With the help of these quantities, color distances ΔE can be determined, the statements about a Allow change in color saturation or hue shift. According to experience 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 dunkle Haut 36.9 29.1 22.8 2 Ha helle Haut 72.8 14.4 19.3 3 Hi blauer Himmel 50.1 -16.2 -24.7 4 Pf Pflanze 35.4 -11.4 14.7 5 Bf Rittersporn 65.5 11.0 -17.0 6 BG Blaugrün 71.8 -24.0 -11.0 7 O Orange 58.0 30.9 59.2 8 PB Blauviolett 35.5 -0.3 -36.5 9 MR mittleres Rot 44.3 45.0 19.3 10 P Violett 28.8 26.9 -10.3 11 YG Gelbgrün 71.6 1.4 60.0 12 OY Orangegelb 70.2 17.0 67.8 13 B Blau 21.3 6.1 -39.4 14 G Grün 43.8 -36.3 19.9 15 R Rot 33.3 50.2 32.6 16 Y Gelb 73.4 13.7 76.6 17 M Purpur 48.7 46.9 -8.6 18 C Blaugrün 45.1 -31.7 -27.8 19 Grau_0.05 Weiß 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 Schwarz 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 2 Ha light skin 72.8 14.4 19.3 3 Hi blue sky 50.1 -16.2 -24.7 4 pf plant 35.4 -11.4 14.7 5 bf delphinium 65.5 11.0 -17.0 6 BG Blue green 71.8 -24.0 -11.0 7 O orange 58.0 30.9 59.2 8th PB blue violet 35.5 -0.3 -36.5 9 MR medium red 44.3 45.0 19.3 10 P violet 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 purple 48.7 46.9 -8.6 18 C Blue green 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

The shift in color rendering compared with layer structure 1 described with the layer structures 2-7 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 2 3 4 5 6 7 No. colour 1 DS 0.2 0.0 0.1 0.0 0.3 0.2 2 Ha 0.1 0.2 0.2 0.3 0.4 0.4 3 Hi 0.1 0.0 0.0 0.0 0.1 0.0 4 pf 0.4 0.3 0.3 0.0 0.9 0.9 5 bf 0.2 0.0 0.0 0.0 0.6 0.5 6 BG 0.4 0.3 0.3 0.1 0.8 0.7 7 O 0.4 0.2 0.3 0.1 0.6 0.6 8th PB 0.1 0.2 0.3 0.0 0.9 0.9 9 MR 0.4 0.0 0.0 0.2 0.6 0.6 10 P 0.1 0.0 0.0 0.4 0.2 0.1 11 YG 0.0 0.0 0.0 0.2 1.1 1.1 12 OY 0.3 0.2 0.3 0.1 1.0 1.0 13 B 0.2 0.4 0.4 0.1 1.6 1.7 14 G 0.0 0.0 0.0 0.1 1.5 1.6 15 R 0.3 0.2 0.2 0.0 0.2 0.2 16 Y 0.0 0.0 0.0 0.3 1.3 1.2 17 M 0.3 0.2 0.2 0.0 1.4 1.4 18 C 0.1 0.0 0.0 0.1 0.2 0.1 19 Grau_0.05 0.2 0.0 0.0 0.0 - - 20 Grau_0.2 0.3 0.1 0.1 0.0 - - 21 Grau_0.4 0.3 0.1 0.2 0.1 - - 22 Grau_0.7 0.1 0.0 0.0 0.0 - - 23 Grau_1.05 0.4 0.2 0.3 0.0 - - 24 Grau_1.5 0.2 0.1 0.1 0.0 0.1 0.1

Example 2

The layer structure 2 according to the invention differs from the layer structure 1 by a reduced amount of UV absorber and by the addition of the longer-wave absorbent dye XBS-2 as follows: layer UV absorbers dyes used mixing ratio kind Amount [g] 9 - - XBS-1, XBS-2 0.8: 0.2 10 - - XBS-1, XBS-2 0.8: 0.2 11 XUV-2 0.25 - -

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 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

The layer structure 3 according to the invention differs from layer structure 1 as follows: layer UV absorbers dyes used mixing ratio kind Amount [g] 9 - - XBS-1, XBS-2 0.5: 0.5 10 - - XBS-1, XBS-2 0.55: 0.45 11 XUV-2 0.15 - -

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 4

The layer structure 4 according to the invention differs from layer structure 1 as follows: layer UV absorbers dyes used mixing ratio kind Amount [g] 9 - - XBS-1, XBS-2 0.55: 0.45 10 - - XBS-1, XBS-2 0.6: 0.4 11 XUV-2 0.1 - -

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

The layer structure 5 according to the invention differs from the layer structure 1 as follows: layer UV absorbers dyes used mixing ratio kind Amount [g] 9 - - XBS-1, XBS-2 0.2: 0.8 10 - - XBS-1, XBS-2 0.15: 0.85 11 XUV-2 0.03 - -

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

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 blue, green and red sensitive layer package was carried out as follows: layer dyes used mixing ratio 3 XRS-4, XRS-5, XRS-3 1: 2: 0.3 4 XRS-4, XRS-5, XRS-3 1: 2: 0.28 6 XGS-1, XGS-2, XGS-3 2.5: 1: 0.9 7 XGS-1, XGS-2, XGS-3 2.5: 1: 1.0 9 XBS-1, XBS-2 0.8: 0.2 10 XBS-1, XBS-2 0.8: 0.2

In addition, the amount of UV absorber XUV-2 in layer 11 was reduced to 0.25 g / m ² .

In addition to the sensitizing dyes already mentioned, the following were used:

With this sensitization, the sensitivity to the comparison type in all sub-layers increased by 35%. The description of the sensitivity distribution (Table 4) shows the symmetrical broadening of the sensitization band especially in the area of the main spectral sensitivities. The colorimetric description (Table 3) shows that in this way only minor and by no means effective images Changes in the color rendering result.

Example 7

In the layer structure 7 according to the invention, the spectral sensitization of the blue, green and red sensitive layer package was carried out as follows: layer dyes used mixing ratio 3 XGS-3, XRS-5, ES-3 1: 2: 0.35 4 XGS-3, XRS-2, XGS-3 1: 2: 0.40 6 XGS-1, XGS-2, XGS-3 2.5: 10: 0.8 7 XGS-1, XGS-2, XGS-3 26: 1.0: 0.9 9 XBS-1, XBS-2 0.75: 0.25 10 XBS-1, XBS-2 0.75: 0.25

In addition, the amount of UV absorber XUV-2 in layer 11 was reduced to 0.25 g / m ² .

This sensitization increases the sensitivity compared to the comparison type in all sub-layers by 30%. The description of the sensitivity distribution (Table 4) shows the symmetrical broadening of the sensitization band, especially in the area of the main spectral sensitivities. The colorimetric description (Table 3) shows that this results in only minor and in no way image-effective changes in the color rendering. example
(Layer structure) Width of the sensitivity distribution [nm] sensitivity Up
[%] blue green red b ₈₀ b ₅₀ b ₂₀ b ₈₀ b ₅₀ b ₂₀ b ₈₀ b ₅₀ b ₂₀ 1 10 76 89 15 38 77 22 43 82 - 6 25 90 107 27 51 88 36 57 97 35 7 24 92 106 28 52 90 34 57 98 30

Claims (5)

1. A high-speed colour photographic recording material having at least one red-sensitive silver halide emulsion layer unit with which a cyan coupler is associated, at least one green-sensitive silver halide emulsion layer unit with which a magenta coupler is associated, at least one blue-sensitive silver halide emulsion layer unit with which a yellow coupler is associated, and optionally further light-insensitive layers, characterized in that the blue-sensitive silver halide emulsion layer unit comprises at least two blue-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitivity curve ensues which is characterized by the following parameters: 460 nm ≤ λ(Smax) ≤ 480 nm b80 ≥ 24 nm b50 ≥ 91 nm b20 ≥ 106 nm, wherein

   λ(S_max)

   denotes the wavelength of the sensitivity maximum (100% sensitivity);

   b₈₀

   denotes the width of the sensitivity curve at 80% of the maximum sensitivity;

   b₅₀

   denotes the width of the sensitivity curve at 50% of the maximum sensitivity;

   b₂₀

   denotes the width of the sensitivity curve at 20% of the maximum sensitivity.

2. A recording material according to claim 1, characterized in that the partial layers of the blue-sensitive silver halide emulsion layer unit are sensitized with sensitizing dyes in such a way that a sensitivity curve ensues which is characterized by the following parameters : b80 ≥ 40 nm b50 ≥ 107 nm b20 ≥ 124 nm.
3. A recording material according to claim 1, characterized in that the partial layers of the blue-sensitive silver halide emulsion layer unit are sensitized with sensitizing dyes in such a way that a sensitivity curve ensues which is characterized by the following parameters : b80 ≥ 57 nm b50 ≥ 124 nm b20 ≥ 137 nm.
4. A recording material according to any of claims 1 to 3, characterized in that the total content of UV absorber compounds having an absorption maximum between 360 and 390 in layers applied on top of the blue-sensitive silver halide emulsion layer unit is not more than 100 mg/m².
5. A recording material according to any of claims 1 to 4, characterized in that the red-sensitive silver halide emulsion layer unit also contains at least two red-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitization band ensues which is characterized by the following parameters : 635 nm ≤ λ(Smax) ≤ 660 nm b80 ≥ 35 nm b50 ≥ 56 nm b20 ≥ 96 nm, and/or that the green-sensitive silver halide emulsion layer unit also contains at least two green-sensitive partial layers which are sensitized with sensitizing dyes in such a way that a sensitization band ensues which is characterized by the following parameters : 540 nm ≤ λ(Smax) ≤ 555 nm b80 ≥ 36 nm b50 ≥ 56 nm b20 ≥ 89 nm.

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