JPH0961963A - Silver halide photographic dry glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silver halide photographic dry glass plate superior in pressure resistance and good in sharpness and handleable in a light room. SOLUTION: This silver halide photographic dry glass plate has a glass support and at least one silver halide emulsion layer and at least one protective layer on the emulsion layer, and the emulsion layer contains a photosensitive silver halide emulsion containing silver chloride in an amount of >=90mol% and this layer has a Vickers hardness ratio of that of the emulsion layer to that of the protective layer of <0.95 or that of the protective layer is >=1.3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic glass dry plate which can be handled in a bright room and has improved pressure fog. More specifically, the blackening pressure fog generated during handling of the glass dry plate and during contact exposure is eliminated. Prevented silver halide photographic glass dry plate.

[0002]

2. Description of the Related Art A silver halide photographic light-sensitive material having a glass support is excellent in dimensional stability, and therefore a light-sensitive material that requires precision, for example, a photomask material for manufacturing ICs and a photomask material for displays. It is also widely used in fields such as photo measurement and phototypesetting.

Conventionally, as a method for producing such a photomask for manufacturing an IC or a photomask for display,
A technique is used in which an original image is reduced and enlarged by a camera, photographed on a film, developed, and then baked and developed on a silver halide photographic light-sensitive material having a glass support to obtain a photomask.

However, since these operations are usually performed in a dark room, the workability is poor, and there are many workability problems such as injury due to scratches or breakage of the glass support, and the glass support There has been a demand for a photosensitive material that can easily handle itself in a bright room.

Further, in recent years, further improvement in sharpness has been demanded as the linear density becomes finer.

However, in the prior art, friction at the time of contact exposure, foreign matter mixed in with the original plate, etc. as a starting point, pressure fog may occur, resulting in pattern noise. Even if the handling property in a bright room was improved, it was impossible to completely wipe out such defects.

As a method for improving the pressure fog, it is effective to provide a protective layer on the silver halide emulsion layer, as is generally done for film-shaped photographic light-sensitive materials. However, if the thickness of the protective layer is too large, there is a drawback that the resolution is deteriorated in contact exposure.

There are many proposals as a method for further improving the pressure fog in the layer structure provided with a protective layer. For example, in JP-A-4-214551, colloidal silica is used for the emulsion layer and a slip agent is used for the protective layer. The method or Japanese Patent Application Laid-Open No. 4-337723 discloses a method in which the swelling rate of a film in water is set to a certain level or more.

However, especially as with glass supports,
In the case of a light-sensitive material coated on a support having a small stress relaxation, it is affected by a stronger pressure than a film, and a higher pressure resistance is desired.

[0010]

With respect to the above problems,
An object of the present invention is to provide a silver halide photographic glass dry plate which has excellent pressure resistance, good sharpness, and can be handled in a bright room.

[0011]

The above object of the present invention can be achieved by the following or by:

In a silver halide photographic glass plate having at least one silver halide emulsion layer on a glass support and at least one protective layer on top of said emulsion layer:
The emulsion layer contains a photosensitive silver halide emulsion having a silver chloride content of 90 mol% or more, and the ratio of the Vickers hardness of the emulsion layer to the Vickers hardness of the protective layer is less than 0.95. And a silver halide photographic glass dry plate.

In a silver halide photographic glass plate having at least one silver halide emulsion layer on a glass support and at least one protective layer on top of said emulsion layer:
A silver halide photographic glass dry plate characterized in that the emulsion layer contains a photosensitive silver halide emulsion having a silver chloride content of 90 mol% or more, and the protective layer has a Vickers hardness of 1.3 or more.

Hereinafter, the present invention will be described specifically.

The Vickers hardness referred to in the present invention is JIS
It is the hardness that can be measured according to the micro hardness test method of Z 2251. Specifically, it is the quotient of the load when a dent is made on the test surface divided by the surface area obtained from the diagonal length of the dent, using an indenter with a square diamond cone with a facing angle of 136 degrees. Can be calculated.

Hv = 1.8544 F / d ² Hv: Vickers hardness F: Load (Kgf) d: Average of diagonal length of dents (mm) Measuring model conforms to JIS B 7734 (micro hardness tester) Must. In the present invention, M
The measurement was performed using HA-400 (manufactured by NEC Corporation).

Although the hardness of the thin film changes depending on the environmental humidity, the value of the present invention is a value measured in an environment at 23 ° C. and a relative humidity of 50%.

The hardness of each of the protective layer and the emulsion layer was determined as follows.

Protective layer: The hardness was obtained when the indenter was pressed to a thickness of 50% of the thickness of the protective layer observed by SEM using a photosensitive material containing a support as a sample.

Emulsion layer: Determined as the hardness when the indenter was pressed to a thickness of 50% of the thickness of the emulsion layer observed by SEM using a sample in which the protective layer was peeled off using a microtome.

When there are two or more emulsion layers, the hardness of the emulsion layers contributing to image formation is indicated. When there are two or more layers contributing to image formation, a microtome is used for the upper layers up to each layer. Was peeled off, the hardness of each layer was measured, and the value of the layer with the lowest hardness was used.

When there are two or more protective layers above the emulsion layer, the hardness of each layer was measured to obtain the value of the layer having the lowest hardness. The hardness ratio between the protective layer and the silver halide emulsion layer is calculated by the following formula.

In the present invention, the ratio of the protective layer hardness [GPa] / emulsion layer hardness [GPa] is less than 0.95, preferably 0.85 or less, more preferably 0.8 or less. is there.

As a means for increasing the hardness of the emulsion layer, a method of adding a solid filler can be mentioned. As the solid filler, JP-A-55-126239 and JP-A-4-2145 are used.
No. 51, colloidal silica, JP-A-60-2024
Examples thereof include colloidal montmorillonite clay described in No. 38 or phosphate represented by hydroxyapatite, tabular silica represented by smectite, inorganic substances such as zeolite, and polymer particles having a Tg of 40 ° C. or higher. These solid fillers are preferably surface-treated for the purpose of stabilizing dispersion. As a specific example of the surface treatment, for example, a silane coupling agent coating or a titanium coupling agent coating as described in JP-A-4-257849 is preferably used.

The solid filler will be described in detail.

Colloidal Silica The colloidal silica (colloidal silica) used in the present invention has an average particle size of 0.005 to 1.0 μm, preferably 0.005 to 0.5 μm, and the main component is silicon dioxide. Alumina, sodium aluminate, or the like may be included as a component. In addition, as stabilizers for these colloidal silicas, sodium hydroxide, potassium hydroxide,
An inorganic base such as lithium hydroxide or ammonia may be contained. Regarding these colloidal silicas, for example, JP-A-53-112732 and JP-B-57-9051.
No. 57-51653 and the like.

Specific examples of the colloidal silica include Snowtex 30 (SiO ₂ / Na ₂ O) manufactured by Nissan Kagaku Co., Ltd.
≧ 57), Snowtex C (SiO ₂ / Na ₂ O ≧ 10
0), Snowtex O (SiO ₂ / Na ₂ O ≧ 50
0), or a product name such as Ludox AM.

Here, SiO ₂ / Na ₂ O means the content weight ratio of silicon dioxide (SiO ₂ ) and sodium hydroxide in terms of sodium hydroxide converted into Na ₂ O. It is the stated value.

Tabular silica The tabular silica used in the present invention means a layered silicate containing alkali, alkaline earth metal, aluminum and the like, and examples thereof include kaolin mineral, mica clay mineral and smectite. Kaolin minerals include kaolinite, decite, nacrite, halloysite, and serpentine. Examples of mica clay minerals include pyrophyllite, talc, muscovite, swellable synthetic fluoromica, sericite, and chlorite. As smectite, smectite,
Examples thereof include vermiculite and swellable synthetic fluorine vermiculite.

Among these, two types are preferable, natural products and synthetic products. Examples of natural products are montmorillonite and beidellite, which are obtained as clays called acid clay and are used as antistatic agents. An example of use in a photosensitive hydrophilic colloid layer is, for example, JP-A-60-2024.
38, 60-239747. However, synthetic compounds are most preferably used because of their excellent transparency, and there are also those containing fluorine for the purpose of improving heat resistance. Specific examples of the synthetic smectites include, for example, Lucentite SWN and SWF of Coop Chemical Co., Ltd. These tabular silicas account for 50% of the total projected area of all silica in the emulsion layers used.
Is preferably tabular silica having an aspect ratio of 2 or more.

The aspect ratio mentioned here represents the ratio of the diameter of a circle having the same area as the projected area of the flat silica and the distance between two parallel planes. In the present invention, the aspect ratio of the tabular silica is preferably 2 or more and less than 100, particularly preferably 2 or more and less than 50. The tabular silica of the present invention preferably has a thickness of 1.0 μm or less, more preferably 0.5 μm or less.

The distribution of tabular grains is 30% or less in terms of the coefficient of variation which is often used (100 times the value S / D obtained by dividing the standard deviation S when the projected area is approximated to a circle by the diameter D), particularly A monodisperse having a content of 20% or less is preferable, but it is not an essential requirement.

Phosphate The phosphate used in the present invention means an inorganic compound having phosphoric acid as a constituent element and a complex of the inorganic compound and an organic compound. Examples of the phosphate include apatite, naconone, ammonium phosphate, calcium phosphate, cobalt phosphate, zirconium phosphate, sodium phosphate, magnesium phosphate, silver phosphate and the like.

Among them, apatite is preferably used. Apatite is a compound belonging to the hexagonal system having a basic composition of M ₁₀ (ZO ₄ ) ₆ X ₂ . There are various combinations of M, Z, and X in the formula, but it is possible to substitute various elements having a valence of 1 to 3 for M, a valence of 3 to 7 for Z, and a valence of 0 to 3 for X.

In many cases, holes are partially formed in M or X. Specifically, hydroxyapatite Ca
₁₀ (PO ₄ ) ₆ (OH) ₂ , Fluorapatite Ca ₁₀ (P
O ₄ ) ₆ F ₂ , chlorine apatite Ca ₁₀ (PO ₄ ) ₆ (OH) ₂
and so on. The apatite may be dense, porous, or any composite structure thereof, and may have any shape such as spherical, amorphous, acicular, or flaky. These apatites are described, for example, in K.K. Hirota
Others, Yogyo-Kyokaishi, 90, 680
(1982), H .; Monma et al., J. Chem. Te
ch. Biotechnol. 31, 15 (1981)
It can be synthesized with reference to.

Zeolite Zeolite used in the present invention is aluminum silicate, and XM ₂ / nO · A based on Al ₂ O _3.
It has a basic composition of l ₂ O ₃ · ySiO ₂ · ZH ₂ O. SiO
₄ , the AlO ₄ tetrahedron has a three-dimensional network structure in which the vertices are shared. M represents an ion-exchangeable metal ion (for example, Na, K, Ca, Ba, etc.), and n represents a valence. X and y are metal oxide, silica coefficient, Z
Represents the number of crystal waters.

There are natural and synthetic zeolites, and any of them can be used. However, synthetic zeolites are preferably used because they contain few impurities. Examples of natural zeolites include analsite, erionite, modelite, chavanite, gmelinite, and levinite. Examples of the synthetic zeolite include zeolite A, zeolite X, zeolite Y, zeolite L, and synthetic mordenite.

The above zeolite may have any of spherical, amorphous, acicular and flaky shapes. The synthetic zeolite can be synthesized, for example, by the method described in JP-A-56-155941.

Examples of commercially available products include 3A manufactured by Tosoh Corporation,
4A, 5A, AW-500, 10X, 13X, molecular sieve LINDER Z manufactured by Union Carbide
Examples thereof include B-300, silicalite, and ZSM-5 manufactured by Mobil.

The particle size of the solid filler is preferably as small as possible because it is directly added to the emulsion layer, preferably 1 μm or less,
It is particularly preferably 0.1 μm or less. Addition amount is 0.1
g / m ² or more is preferable, and more preferably 0.2 g /
It is not less than m ^{2 and not} more than 1.0 g / m ² .

In the present invention, various plasticizers can be used as a means for lowering the hardness of the protective layer. Specific examples of the plasticizer in the invention include polymers having Tg of 40 ° C. or lower, alkyl phthalates described in British Patent 738,637, alkyl esters described in British Patent 738,689, and US Pat. No. 2,960,404. Examples thereof include polyhydric alcohols, and polymers having Tg of 35 ° C. or lower are preferable. The form of the polymer as the plasticizer in the present invention may be either water-insoluble or water-soluble, and the form of water-insoluble polymer latex is particularly preferable.

The polymer latex to be contained in the protective layer of the present invention is, for example, US Pat. No. 2,772,166.
Issue 3, Issue 3,325,286, Issue 3,411,911
Nos. 3,311,912 and 3,525,620
Issue, Research Disclosure 1955
1 (July 1980), etc.,
It is a hydrate of a vinyl polymer such as methacrylic acid ester and styrene.

Preferred polymer latexes having Tg of 40 ° C. or lower are homopolymers of alkyl acrylates such as methyl acrylate, ethyl acrylate and butyl acrylate, or alkyl acrylate and acrylic acid,
A copolymer with N-methylol acrylamide or the like (preferably a copolymerization component with acrylic acid or the like is up to 30% by weight), a homopolymer of butadiene or one or more of butadiene and styrene, butoxymethyl acrylamide, acrylic acid. And a vinylidene chloride-methyl acrylate acrylic acid terpolymer.

The Tg of the polymer latex can be determined by the method of differential scanning calorimetry (DSC). The average particle size of the polymer latex used in the present invention is 0.0
It is from 05 to 1 μm, and particularly from 0.02 to 0.3 μm. The amount of the polymer latex added is preferably 5 to 200%, particularly preferably 10 to 100% based on the weight of the hydrophilic colloid in the layer to be added.

Specific examples of the polymer latex are shown below.

[0046]

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In addition to the above, JP-A-6-43572,
Polymer latexes described in JP-A-60-31135 and JP-A-59-224839 can be preferably used.

The silver halide used in the glass plate of the present invention can be selected from silver chloride, silver chlorobromide and silver chloroiodobromide.
The silver chloride ratio is 90 mol% or more, preferably 95 to 10
0 mol%. The average particle diameter is in the range of 0.05 to 0.5 μm, and the most preferable value is 0.0.
The thickness of 7 to 0.3 μm is preferable. Particle size 0.05μ
If it is less than m, silver sludge is remarkable, and if it is more than 0.5 μm, the maximum density is lowered and the safelight property is deteriorated, which is not preferable.

The silver halide photographic glass dry plate of the present invention contains an inorganic desensitizer such as rhodium salt and iridium salt, and an organic desensitizer such as pinacryptol yellow and phenosafranine in order to improve handling in a bright room. It is preferable.
The addition amount of the inorganic desensitizer is 10 ^-6 to 10 ^-3 mol / A
g mol is preferable, and the addition amount of the organic desensitizer is 10 ^-5.
-10 ^-2 mol / Ag mol is preferred.

For the same purpose, 400 to 400% in a photographic plate.
It is preferable to contain a dye having an absorption maximum at 550 nm. The addition amount is 10 to 1000 m per 1 m ² .
g is preferable, and more preferably 30 to 800 mg.

The silver halide photographic glass dry plate of the present invention preferably contains a silane coupling agent in the lowermost layer on the emulsion surface side for the purpose of adhering the emulsion film to the support. The silane coupling agent is preferably a compound represented by the following general formula [S].

[0052]

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[In the formula, X is an oxygen atom or -O-CO-
Represents R ₁₁ , R ₁₂ , R ₁₃ and R ₁₄ each represent a halogen atom or an optionally substituted hydrocarbon group, and R ₁₁
At least one of R ₁₄ includes a double bond, a halogen atom, an epoxy group, an acid anhydride residue, an alkoxycarbonyl group or an amino group. n ₁ , n ₂ and n ₃ each represent 0 or 1, and n ₁ + n ₂ + n ₃ is at least 1. In the general formula [S], examples of the halogen atom represented by R _{11 to} R ₁₄ include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like, and the hydrocarbon group which may be substituted is: Each of them includes saturated and unsaturated chain and cyclic groups, and examples thereof include an alkyl group (eg, methyl, ethyl, propyl, etc.), an alkenyl group (eg, vinyl, allyl, etc.), an aryl group (eg, phenyl, tolyl, etc.) and the like.

The double bond contained in at least one of R _{11 to} R ₁₄ is a C═C bond, and is, for example, an alkenyl group, acryloyl group, methacryloyl group, vinylcarbonylamino group,
Introduced as an isopropenylcarbonylamino group and the like,
Examples of the acid anhydride residue include a group such as a methylcarbonyloxycarbonylethyl group, and a halogen atom may be introduced in a form such as a haloacylamino group.

Specific preferred examples of the compound represented by the general formula [S] are shown below, but the invention is not limited thereto.

[0056]

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[0057]

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The compound represented by the general formula [S] is described in Japanese Examined Patent Publication No.
It can be synthesized by the method described in JP-A-8-3565, and can also be obtained as a commercial product from Toray Silicon Co., Ltd. or Chisso Corporation.

The silane coupling agent may be contained in any layer as long as it is on the emulsion layer side. For example, it is added to any hydrophilic colloid layer such as a silver halide emulsion layer, a subbing layer and a protective layer. Alternatively, it may be contained by treating the glass surface with the compound.

A preferred mode is one in which a silane coupling agent is contained in a silver halide emulsion for coating, or the surface of a glass support is treated with a silane coupling agent. More preferable is a mode in which a silane coupling agent is contained in a silver halide emulsion for coating. The latter mode has an advantage that the manufacturing process of the photosensitive material is simple.

When the compound is added to a hydrophilic colloid layer such as a silver halide emulsion layer, it is preferably dissolved in water, lower alcohol, acetone or the like and added. The addition amount is preferably in the range of 2 × 10 ^{−6 to} 6 × 10 ⁻² mol per 1 g of the hydrophilic colloid.

When the glass surface is treated with the compound, it may be applied to the glass surface by immersion in a solution dissolved in a solvent, showering or the like as in the above. The amount applied to the glass surface is preferably in the range of 6 × 10 ⁻⁵ to 2 × 10 ⁻³ mol / m ² .

The glass support used in the present invention is not particularly limited in glass composition, but soda lime glass, soda lime aluminum glass and the like are preferable. Further, in order to enhance the flatness of the glass support, the molten glass is produced while being gradually cooled on a bath of the molten stannic chloride solution,
A glass support manufactured by a so-called float method can also be preferably used.

The surface of the support is degreased and pretreated to improve hydrophilicity before the surface treatment with the silane coupling agent and the application of the coating solution for the hydrophilic colloid layer. It is preferable. The end face of the support is preferably polished for handling.

In the glass dry plate of the present invention, a backing layer containing a light absorbing dye can be provided on the surface opposite to the silver halide emulsion layer. The light absorbing dye can be selected from any dyes.

Regarding the silver halide emulsion for forming the silver halide emulsion layer of the glass plate of the present invention and the method for producing the same, Research Disclosure 176 is used.
43, pages 22 to 23 (December 1978) can be referred to. Regarding the silver halide emulsion layer and the silver halide emulsion forming the layer, Japanese Patent Application No. 6-105.
No. 672, paragraph numbers 0092 to 0102 can be referred to.

The silver halide photographic glass dry plate of the present invention can be subjected to various known development processes.

The fixing solution for processing the silver halide photographic glass dry plate of the present invention preferably contains a hardening agent. The hardener contained in the fixing is preferably aluminum chloride, aluminum sulfate, potassium alum, glutaraldehyde or the like.

[0069]

EXAMPLES Examples of the present invention will be specifically shown below, but the present invention is not limited to these examples.

Example 1 (Preparation of silver halide emulsion A) (a) Gelatin 10 g Pure water 740 ml Nitric acid (0.5 N) 2 ml (b) NaCl 35 g Gelatin 7 g K ₃ RhCl ₄ 12 mg Pure water 220 ml (C) AgNO ₃ 100g Pure water 230ml Nitric acid (0.5N) 1ml In solution (a) kept at 40 ° C, liquids (b) and (c) were kept at pAg of 7 by the control double jet method,
Add at a constant speed for 55 minutes, average particle diameter 0.11 μm,
A pure silver chloride emulsion having a monodispersity of 12 was prepared. After removing soluble salts from this emulsion by a conventional method, gelatin was added.

(Preparation of Silver Halide Emulsion B) 35 g of NaCl in the solution (b) in the preparation of Emulsion A was replaced with Na
A silver chlorobromide containing 60 mol% of silver chloride was prepared in the same manner as the silver halide emulsion A except that Cl 21.7 g and KBr 18 g were used.

To each of the silver halide emulsions A and B thus obtained, 50 mg of 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene was added per mol of silver, and further per mol of silver. 30 mg of sodium thiosulfate was added, and chemical aging was performed at 56 ° C. for 60 minutes under the conditions of pH 5.8 and pAg 6.5. 4 after aging
2.5 g of -hydroxy-6-methyl-1,3,3a, 7-tetrazaindene was added per mol of silver.

(Preparation of silver halide photographic light sensitive plate) 5 m
A backing liquid having the following formulation was applied to the air surface of a float glass having a thickness of 8 m / m ² so that the silver halide emulsion layer having the following formulations (1) and (2) was applied on the tin surface to obtain a gelatin amount. There was coated as 4.5 g / m ² silver amount is 4.1 g / m ^2, further protective layer having the following formulation (3) on the so-weight gelatin is 0.8 g / m ² that Apply and sample 1-12
I got

Formulation (1) Composition of silver halide emulsion layer Gelatin 4.5 g / m ² Silver halide emulsion A Silver amount 4.1 g / m ² Compound Q 50 mg / m ² Compound R 50 mg / m ² 1-Phenyl-5 -Mercaptotetrazole 20 mg / m ² Dye F-1 100 mg / m ² Polymer latex 1 1 g / m ² Solid filler Amount shown in Table 1 Surfactant P 1.5 mg / m ² Hardener H 30 mg / m ² Silane Coupling agent S- (4) 200 mg / m ² Formulation (2) Silver halide emulsion layer composition Formula (1) except that the silver halide emulsion was changed from A to B
A sample was obtained in the same manner as in.

Formulation (3) Emulsion protective layer composition A solution having the following composition was prepared.

Gelatin 0.8 g / m ² Polymethylmethacrylate having an average particle size of 2.9 μm 30 mg / m ² Surfactant P 17 mg / m ² Dye F-2 50 mg / m ² Solid filler or plasticizer Amount of Hardener H 30 mg / m ² (Preparation of backing liquid) A solution having the following composition was prepared.

Compound B 40 g Dye F-3 10 g Ethanol 900 ml

[0078]

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[0079]

[Chemical 6]

Table 1 shows the conditions of the silver halide photographic glass dry plate samples 1 to 12 thus produced.

[0081]

[Table 1]

The obtained samples were evaluated by the following methods.

The processing during evaluation was performed under the following conditions.

(Developer Solution Formulation) Hydroquinone 5 g Monomethyl-p-aminophenol sulfate 1.5 g Potassium bromide 4 g Potassium sulfite 60 g Boric acid 16 g Potassium hydroxide 37 g Water was added to 1000 ml, and the pH was adjusted to 11.3 with potassium hydroxide. did.

(Fixer Formulation) (Composition A) Ammonium thiosulfate (72.5% w / v aqueous solution) 20 ml Sodium sulfite 17 g Sodium acetate trihydrate 6.5 g Boric acid 6 g Sodium citrate dihydrate 2 g Acetic acid (90 w / V%) 13.6 ml (Composition B) Pure water (ion exchanged water) 17 ml Sulfuric acid (50% w / w aqueous solution) 4.7 ml Aluminum sulphate (Al ₂ O ₃ equivalent content is 8.1% w / w) Aqueous solution) 26.5 g When the fixing solution was used, the above composition A and composition B were dissolved in 500 ml of water in this order and finished to 1 liter before use. The pH of this fixer was adjusted to 4.3 with acetic acid.

(Development processing conditions) (Process) (Temperature) (Time) Current image 20 ° C 5 minutes Settlement 20 ° C 2 minutes Water wash 20 ° C 5 minutes Dry natural drying (safety light test) Commercial fluorescence An ultraviolet cut filter was attached to the lamp, and an exposure test was conducted on the sample obtained under a light source of 200 Lx, and the time at which the fog density became 0.01 was measured.

(Image Evaluation) A 10 μm line width line drawing pattern of a chrome plate original was manufactured by Dainippon Screen Co., Ltd. P-
The emulsion surfaces were contact-exposed to each other with a line width of 1: 1 using a 627-FN bright room printer, and after processing and drying, fringes and sharpness of line drawing quality were visually evaluated.

(Evaluation of Vickers hardness) Measuring instrument: thin film hardness meter MHA-400 manufactured by NEC Corporation Measuring conditions: 23 ° C. 50% RH Measuring method: The measuring method was performed as described above.

(Evaluation of Pressure Fog) Under the environment of 23 ° C. and 50% RH, each sample was subjected to a continuous load of 0 to 200 g on a sapphire needle having a diameter of 0.25 mm, and then the same treatment was performed. The evaluation was made by the load at which black streaks began to form on the emulsion film.

Table 2 shows the above evaluation results.

[0091]

[Table 2]

[0092]

According to the present invention, there is provided a silver halide photographic glass dry plate which has excellent pressure resistance, good sharpness and can be handled in a bright room.

Claims (2)

[Claims] 1. A silver halide photographic glass plate having at least one silver halide emulsion layer on a glass support and at least one protective layer on the emulsion layer.
The emulsion layer contains a photosensitive silver halide emulsion having a silver chloride content of 90 mol% or more, and the ratio of the Vickers hardness of the emulsion layer to the Vickers hardness of the protective layer is less than 0.95. And a silver halide photographic glass dry plate. 2. A silver halide photographic glass plate having at least one silver halide emulsion layer on a glass support and at least one protective layer on the emulsion layer.
A silver halide photographic glass dry plate characterized in that the emulsion layer contains a photosensitive silver halide emulsion having a silver chloride content of 90 mol% or more, and the protective layer has a Vickers hardness of 1.3 or more.