JPH07110543A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To attain excellent sharpness without fault of remaining color even in super rapid, less replenishment and less waste water treatment by constituting a supporting body of polyethylene naphthalate or an organic high polymer containing the same. CONSTITUTION:In the silver halide photographic sensitive material for CRT photograph provided with a photosensitive silver halide emulsion layer on one side of the supporting body, the supporting body is made of only polyethylene naphthalate or the organic high polymer containing polyethylene naphthalate. The organic high polymer containing polyethylene naphthalate represents a mixture of polyethylene naphthalate with another organic high polymer material or a copolymer having a repeating unit expressed by a formula in the structure. The content of polyethylene naphthalate is preferably >=10% by weight ratio, and more preferably >=20%. >=50% of silver halide particles in the emulsion layer consists preferably of platelike particles having 3-20 aspect ratio.

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 light-sensitive material free from fog due to residual color, and firstly to a photographic light-sensitive material for CRT (Cathode Rays Tube) image pickup (hereinafter referred to as CRT light-sensitive material). More specifically, the present invention relates to a single-sided photosensitive photographic material including a CRT sensitizer that can obtain a sharp image quality, and thus can faithfully reproduce a CRT display image. Secondly, a fluorescent sensitization such as X-ray photography. In order to obtain a photographic light-sensitive material that is most suitable for mammography, limb bone photography, etc. that requires high sharpness and high image quality, using paper or fluorescent screen, obtain a photograph with high sensitivity and excellent graininess and sharpness. The present invention relates to a single-sided photosensitive photographic material that can be used.

[0002]

2. Description of the Related Art In recent years, the development of medical electronic technology has been remarkable, and CR (computer radiography), CT
(Computer tomography), US (ultrasonic diagnosis), RI (nuclear medicine), and new diagnostic methods using ME devices such as thermography have made remarkable progress. These diagnostic methods output various measurement inputs to a display, unlike the conventional method of directly photographing X-rays on a photographic light-sensitive material for X-rays, and make a diagnosis by viewing this display. However, when a doctor actually makes a diagnosis, not only a CRT display but also a recording material such as a photographic light-sensitive material for X-rays is often photographed, and after development, it is often revisited at a different place and time. A CRT sensitive material that faithfully reproduces is desired. In the developing process of photographic light-sensitive materials (hereinafter referred to as "sensitive materials"), high-temperature rapid processing has rapidly spread, and the processing time of various photosensitive materials by an automatic developing machine has been greatly shortened. This rapid processing requires a developer for achieving sufficient sensitivity in a short time, and a film property of a photosensitive material that is excellent in development progress, provides a sufficient degree of blackening in a short time, and is dried in a short time after washing with water. is necessary. As a method for improving the drying property of a light-sensitive material, a sufficient amount of a hardening agent (gelatin cross-linking agent) is added in advance in the step of applying the light-sensitive material, and the emulsion layer or hydrophilic colloid layer in the development-fixing-water washing step is added. It is common to reduce the swelling amount of the photosensitive material to reduce the water content of the photosensitive material before the start of drying. With this method, the drying time can be shortened by increasing the amount of hardener used, but the development delay due to the decrease in the swelling amount in the developer, low sensitivity, softening, lowering of the covering power, and residual silver due to the fixing delay. Many problems such as residual hypo, residual color of sensitizing dye, and deterioration of roller marks are obstacles to shortening the processing time.

On the other hand, as a method for increasing the activity of the processing solution,
It is effective to increase the amount of the developing agent or auxiliary developing agent in the developing solution, increase the pH of the developing solution, and increase the temperature. However, all of these methods are accompanied by deterioration of stability of the processing solution with time, softening, and increase of fog. For the purpose of improving the viewpoints described above, a technique utilizing tabular grains is disclosed in US Pat. No. 4,439,520.
No. 4,425,425 and the like. Further, in JP-A-58-111933, a radio wave having a high covering power by using tabular grains so that the swelling of the hydrophilic colloid layer is 200% or less and there is no need to add a dura during treatment is used. A photographic element for photography is disclosed. Further, JP-A-63-305343 and JP-A-1
No. 77047 discloses a technique for improving the development progress and the sensitivity / fogging ratio by controlling the development start point of a silver halide grain having a (111) plane to the vertex and / or peak of the grain and the vicinity thereof. ing. These known techniques are excellent techniques for improving the development progress of the light-sensitive material, and have high utility value. In order to obtain a silver halide grain which gives a sufficient degree of blackening in a short development time of 10 seconds or less by using the above technique, a silver sensitizing dye such as a spectral sensitizing dye is adsorbed to control the development starting point. It requires a lot of substances. However, in a dry to dry processing time of 35 seconds or less, residual color and defective fixing become apparent. Further, in a light-sensitive material having an emulsion layer only on one side such as a light-sensitive material for medical CRT image, an antihalation dye is usually contained in the backing layer in order to improve the sharpness of the image. Further, a dye is used for the backing layer in order to facilitate the front / back discrimination in a dark room. However, the residual color of these dyes becomes apparent in a dry to dry treatment time of 35 seconds or less. Especially CRT
Since the X-ray fluorescent substance and the X-ray fluorescent substance emit strong light in the ultraviolet region, many dyes are required to sufficiently exhibit the antihalation effect.

Further, it is preferable to reduce the waste liquid discharged in a large amount when the silver halide photographic light-sensitive material is processed, from the viewpoint of environmental protection. In addition, a wide space is required for storing the waste liquid awaiting recovery and the replenisher before use, and thus a low replenishment and low waste liquid system is desired. However, in such a system with less liquid exchange, the elution component of the photosensitive material accumulates in the liquid, and similar to rapid processing, there is a delay in progress, low sensitivity, softening, residual silver due to fixing delay, residual hypo, and sensitizing dye. It causes many problems such as residual color and deterioration of roller marks.

[0005]

DISCLOSURE OF THE INVENTION The object of the present invention is to prevent residual color at all even in ultra-rapid, low-replenishment and low-waste liquid treatment.
And to provide a sensitive material having a good sharpness.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a silver halide photographic light-sensitive material for CRT photography having at least one light-sensitive silver halide emulsion layer on one side of the support, wherein the support is polyethylene A silver halide photographic material for CRT photography characterized by comprising an organic polymer containing phthalate or polyethylene naphthalate, and / or a radiograph having at least one light-sensitive silver halide emulsion layer on one side of a support The single-sided light-sensitive material was achieved by a radiographic single-sided light-sensitive material characterized in that the support was composed of polyethylene naphthalate or an organic polymer containing polyethylene naphthalate.

The present invention will be described in detail below.

The support used in the present invention consists of polyethylene naphthalate only or an organic polymer containing polyethylene naphthalate. The organic polymer containing polyethylene naphthalate means a mixture of polyethylene naphthalate with another organic polymer material, or a copolymer having the repeating unit of the general formula I in its structure.

[0009]

[Chemical 1]

The organic polymer material may be any material as long as it is sufficiently mixed with polyethylene naphthalate, but polyethylene terephthalate is preferred. Further, as a method of mixing these materials, there are a method of dissolving and mixing in an organic solvent and a method of heating and melting and mixing. The content of polyethylene naphthalate is preferably 10% or more by weight, and more preferably 20% or more. When polyethylene naphthalate is contained by copolymerization, the content ratio is the weight ratio of the structural part of the general formula I.

The support used in the present invention may have any thickness, but is preferably 60 μm or more and 300 μm or less. If it is too thin, the rigidity will be insufficient, and if it is too thick, the weight of the light-sensitive material will increase and the handleability will deteriorate.

The dye for the backing layer used in the present invention may be one that is decolorized with sulfite ion or alkali, or one that diffuses into the treatment liquid. Specifically, exemplary compound (1)
~ (22), but the present invention is not limited thereto.

[0013]

[Chemical 2]

[0014]

[Chemical 3]

[0015]

[Chemical 4]

[0016]

[Chemical 5]

Although one or more kinds of these dyes are used, it is not important how many kinds are used and it is important to appropriately contain them in the backing layer. That is, when the transmission absorption density of the backing layer at any wavelength of 300 nm or more and 450 nm or less is measured by a spectrophotometer, the absorbance is preferably 0.5 or less, and 0.1 or more and less than 0.4. More preferable. If the density is too high, it causes deterioration of the residual color and causes the uneven transfer of the dye when the light-sensitive material is stored with the emulsion surface and the backing surface overlapping. Further, if the density is too low, the sharpness of the image may decrease. Further, a dye having an absorption in a region different from the absorption of the emulsion may be used in combination for the purpose of preventing halation in the intrinsic absorption of the emulsion, discriminating between front and back. The concentration of the dye having absorption in a region different from that of the emulsion can be selected depending on the purpose, but the sum of absorption peak values of various dyes is preferably less than 2.0. More preferably, the sum of peak values is less than 1.5. The dye in the present invention may be added in any form such as an aqueous solution, an organic solvent solution, one dispersed as fine particles in a solid state, or one dissolved and dispersed in oil droplets. Further, an ionic polymer compound or the like may be used in combination so as to mord the dye.

The gelatin used in the backing layer of the present invention is lime-processed gelatin, acid-processed gelatin or enzyme-processed gelatin, and a part of gelatin may be replaced with a synthetic or natural polymer. The amount of gelatin used is preferably 4.0 g or less per 1 m ² . When the amount of gelatin is large, not only the drying property in an automatic processor is deteriorated, but also the loss of dye may be deteriorated. Further, inorganic fine particles such as colloidal silica or an organic plasticizer such as ethyl acrylate / acrylic acid copolymer may be contained as a film quality improving agent. It is preferable to have an overcoat layer on the backing layer of the present invention. By having an overcoat layer, transfer of dye, exudation, etc. are improved. The overcoat layer preferably contains a matting agent. A matting agent has a particle size of 0.1 made of organic or inorganic substances.
It is a fine particle of about 10 μm and is well known in the art. The overcoat layer may be divided into two or more layers and applied. It is preferable that the backcoat layer and the overcoat layer are simultaneously coated. The surfactant used in the present invention includes natural surfactants such as saponin; nonionic surfactants such as alkylene oxide-based, glycerin-based and glycidol-based surfactants;
Cationic surfactants such as higher alkyl amines, quaternary ammonium salts, phosphoniums or sulfoniums;
Anionic surfactants such as carboxylic acid, sulfonic acid, phosphoric acid, and sulfuric acid ester; amphoteric surfactants such as amino acids, aminosulfones, amino alcohol esters; and fluorine in which a part of the above surfactants is fluorine or alkyl. A system surfactant is used.

The thickness of the backing layer used in the present invention is preferably 1.0 μm or more and less than 5.0 μm. If the backing layer is too thin, curling will worsen, and if it is too thick, the drying property will decrease and rapid processability will be impaired. A sheet-shaped photosensitive material such as a CRT photographing photosensitive material and a single-sided X-ray photosensitive material requires a backing layer to prevent curling. The present invention is also effective for a roll-shaped photosensitive material having no backing layer such as an indirect X-ray photosensitive material.

The silver halide that can be used in the silver halide emulsion may be any of silver chloride, silver chlorobromide, silver bromide, silver iodobromide and silver chloroiodobromide, but it contains iodine. The amount is preferably 1% or less per mol of silver. A
The gI distribution may be a high internal concentration or an external high concentration. In the process of silver halide grain formation or physical ripening, a cadmium salt, a zinc salt, a lead salt, a thallium salt, an iridium salt or a complex salt thereof, a rhodium salt or a complex salt thereof, an iron salt or a complex salt thereof may be present together.
Further, if necessary, chemical sensitization can be performed.

The form of silver halide grains that can be used in the silver halide emulsion is preferably tabular in majority. The proportion of tabular grains contained in the emulsion layer is 5 in terms of the projected area of the silver halide grains.
It is preferably 0% or more, more preferably 70% or more. The aspect ratio of a tabular grain is given by the average value of the ratio of the diameter of a circle having an area equal to the grain projected area of each tabular grain and the grain thickness of each tabular grain. The particle form in the present invention preferably has an aspect ratio of 3 or more and less than 20, more preferably 4 or more and less than 10. Furthermore, the thickness of the particles is preferably 0.3 μm or less, and particularly preferably 0.
It is preferably 2 μm or less. The tabular silver halide emulsion is described in JP-A-58-127927 and JP-A-58-113927.
It can be easily prepared by referring to the method described in JP-A No. 58-113928. Further, in an atmosphere having a relatively low pBr value of pBr 1.3 or less, the weight of tabular grains is 4
It is obtained by forming seed crystals of 0% or more and growing the seed crystals while simultaneously adding silver and a halogen solution while keeping the pBr value at the same level. In this growth process, it is desirable to add a silver and halogen solution so that new crystal nuclei are not generated. The size of tabular silver halide grains can be adjusted by controlling the temperature, selecting the type and amount of solvent, and controlling the addition rate of silver salt and halide used during grain growth.

The emulsion layer of the present invention contains 1.
It is preferable to contain a thiocyanic acid compound in an amount of 0 × 10 ⁻³ mol or more and less than 2.0 × 10 ⁻² mol. The thiocyanate compound may be added in any process of grain formation, physical ripening, grain growth, chemical sensitization and coating, but addition before chemical sensitization is preferable. As the thiocyanic acid compound used during the preparation of the silver halide emulsion in the present invention, a water-soluble salt such as a metal thiocyanate or an ammonium salt can be generally used, but in the case of a metal salt, the photographic performance is adversely affected. Care should be taken to use metal elements that do not exceed the range, with potassium and sodium salts being preferred. Also, Ag
A sparingly soluble salt such as SCN may be added in the form of fine particles. In this case, the size of the AgSCN fine particles is preferably 0.2 μm or less in diameter, and particularly preferably 0.05 μm or less.

The silver halide emulsion used in the present invention can be chemically sensitized. Chemical sensitization methods include sulfur sensitization, selenium sensitization, complex salts, reduction sensitization with polyamines, gold sensitization with gold compounds, or sensitization with metals such as iridium, platinum, rhodium and palladium. Known methods such as can be used. These may be used in combination as necessary. Particularly, it is preferable to carry out the sulfur sensitization method using a sulfur-containing compound and / or the selenium sensitization method using a selenium-containing compound in the presence of a compound capable of adsorbing to silver halide. The compound adsorbed on silver halide as used herein means a class of spectral sensitizing dyes or photographic stabilizers, and is disclosed in JP-A-63-305343.
The compounds disclosed in JP-A-1-77047 and the like can be used.

The silver halide emulsion used in the present invention is CR
It must be orthospectral sensitized appropriately for T exposure. The sensitizing dye may be added in any step of the production of the light-sensitive material, but it is preferable to add the chemical sensitizer. In particular, it is preferable to raise the temperature of the emulsion for chemical ripening.
Specific examples of the sensitizing dye used in the present invention are shown below, but the present invention is not limited thereto.

[0025]

[Chemical 6]

[0026]

[Chemical 7]

The silver amount of the light-sensitive material of the present invention is preferably 0.5 to 5 g / m ² (per surface), more preferably 1.4 to 3.2 g / m ² (per surface). It is preferred that the suitability for rapid processing does not exceed 5 g / m ² .

As the processing liquid of the present invention, Akira Sasai, "Chemistry of Photography", Chapter 13 (Photo Industry Publishing Co., 2nd Edition, 1987)
Developers described on April 5, 2015) are used. As a processing method, so-called rapid processing using an automatic processor is preferable. The processing of the present invention includes CEPROS series manufactured by Fuji Photo Film Co., Ltd. and SRX manufactured by Konica Corporation.
Series, EASTMAN KODAK Co. RA made
Ultra rapid processing by an automatic processor such as a series is more preferable, and processing by a dry to dry system of 35 seconds or less is particularly preferable.

The present invention is effective even in ordinary processing, but is particularly effective in processing in a low-waste environmental protection type automatic developing machine in which the developer replenishing amount is 25 ml or less per sheet (10 × 12 inches). Is big. It is particularly preferable that the relationship between the processing time and the replenishment amount is represented by the following formula A. (Formula A) 300 ≦ S × T ≦ 1000 Here, S is a four-fold amount of developer replenishment amount (ml) per sheet,
T represents the processing time (seconds) of Dry to Dry. The replenishing amount of the fixing solution is preferably 25 ml or less.

Various additives and the like used in the photographic light-sensitive material of the present invention are not particularly limited in addition to the above, and for example, the ones described in the following relevant parts can be used. Item Applicable place 1) Silver halide emulsion and its manufacturing method JP-A-2-68539, page 8, lower right column, line 6 to page 10, upper right column, line 12 and JP 3-24537, page 2 Lower right column, line 10 to page 6, upper right column, line 1; page 10, left upper column, line 16 to page 11 lower left column, line 19; Japanese Patent Application No. 2-225637. 2) Chemical sensitization method JP-A-2-68539, page 10, upper right column, line 13 to upper left column, line 16; Japanese Patent Application No. 3-105035. 3) Antifoggant, Stabilizer JP-A-2-68539, page 10, lower left column, line 17 to page 11, upper left column, line 7 and page 3, lower left column, line 2 to page 4, lower left column . 4) Color tone improving agent JP-A-62-276539, page 2, lower left column, line 7 to page 10, lower left column, line 20; Tokukaihei 3-94249, page 6, lower left column, line 15 to 11 Top right column, line 19 5) Spectral sensitizing dye JP-A-2-68539, page 4, lower right column, line 4 to page 8, lower right column. 6) Surfactants and antistatic agents JP-A-2-68539, page 11, upper left column, line 14 to page 12, upper left column, line 9 7) Matting agent, slip agent, plasticizer JP-A-2-68539, page 12, upper left column, line 10 to same upper right column, line 10, page 14 lower left column 10 line to same lower right column, line 1. 8) Hydrophilic colloid JP-A-2-68539, page 12, upper right column, line 11 to left lower column, line 16 9) Hardener JP-A-2-68539, page 12, upper right column, line 17 to page 13, upper right column, line 6 10) Dyes and mordants JP-A-2-68539, page 13, lower left column, line 1 to page 14, lower left column, line 9 No. 3-24539, page 14, lower left column, to page 16, lower right column. 11) Polyhydroxybenzenes JP-A-3-39948, page 11, upper left column to page 12, lower left column, EP Patent No. 452772A. 12) Layer structure JP-A-3-198041. 13) Development method From JP-A-2-103037, page 16, upper right column, line 7 to page 19, left lower column, line 15 and JP-A-2-115837, page 3, lower right column, line 5 Page 10, upper right column, line 10

The photographic light-sensitive material of the present invention relates to a black and white single-sided light-sensitive material, preferably an X-ray film for direct photography,
It is used in a system for irradiating an object such as a human body such as an X-ray film for indirect imaging and a film for CRT imaging with X-rays and the like, and converting the X-rays passing through the object into visible light for exposure. Examples thereof include medical or industrial X-ray photographic materials, X-ray dupe photographic materials, medical CRT image photographic materials, and the like.

[0032]

【Example】

Example 1 (Preparation of emulsion) In 1 liter of water, 6.2 g of gelatin (average molecular weight 15,000) and 40 g of potassium bromide (6.9 g) were added.
While stirring, an aqueous solution containing 4.0 g of silver nitrate and an aqueous solution containing 5.9 g of potassium bromide were added to the aqueous solution kept at 0 ° C. by a double jet method in 37 seconds. Then gelatin 1
After adding an aqueous solution containing 8.6 g, the temperature was raised to 60 ° C. while adding an aqueous solution containing 9.8 g of silver nitrate over 22 minutes. Further, 5.9 ml of 25% aqueous ammonia solution was added, and 10 minutes after that, an aqueous solution containing 5.5 g of acetic acid was added. Subsequently, an aqueous solution of 151 g of silver nitrate and an aqueous solution of potassium bromide were added over 35 minutes by the control double jet method while maintaining the potential at pAg of 8.8. The flow rate at this time is 14 times the flow rate at the end of addition,
Accelerated to double. Further, potassium hexachloroiridate (III) was dissolved in this potassium bromide aqueous solution so that the amount of addition was 25 μg. After addition is complete 2
15 ml of N potassium thiocyanate solution was added. After that, the temperature was lowered to 35 ° C. to remove soluble salts by a precipitation method, then the temperature was raised to 40 ° C., 35 g of gelatin and 85 mg of proxel and a thickener were added, and caustic soda, potassium bromide and silver nitrate aqueous solution were added. pH 6.1, pAg
Adjusted to 7.8. The temperature was raised to 56 ° C., 3 mg of sodium ethylthiosulfonate was added, and the diameter was 0.07 μm.
AgI fine particles of m were added in an amount of 0.1 mol% based on the total amount of silver. Then add 0.04 mg of thiourea dioxide and add 4
-Hydroxy-6-methyl-1,3,3a, 7-tetrazaindene 1.1 * 10 < ^-3 > mol / mol Ag and dye I were added to 7.2 * 10 < ^-4 > mol / mol Ag. After 10 minutes, 0.52 × 10 ⁻⁵ mol / mol Ag of selenium compound-I,
Sodium thiosulfate 1.03 × 10 ⁻⁵ mol / mol Ag,
30 mg of potassium thiocyanate and 6 mg of chloroauric acid were added, and the mixture was aged for 50 minutes. Then, it was rapidly cooled and solidified. In the obtained emulsion, 93% of the total projected area of all grains was composed of grains having an aspect ratio of 3 or more, and the average projected area diameter of all grains having an aspect ratio of 3 or more was 0.83 μm.
The standard deviation was 15%, the average thickness was 0.14 μm, and the average aspect ratio was 6.2.

[0033]

[Chemical 8]

(Preparation of Emulsion Surface Coating Solution) <Emulsion Layer Coating Solution> The following chemicals were added to 1 mole of silver halide to the chemically sensitized emulsion to prepare a coating solution.・ 2,6-bis (hydroxyamino) -4-diethylamino-1,3,5-triazine 72.0 mg ・ dextran (average molecular weight 39,000) 3.9 g ・ potassium polystyrene sulfonate (average molecular weight 600,000) 0 Additive-I 7.0 mg Additive-II 16.0 mg Sodium hydroquinone monosulfonate 8.2 g Snowtex C (Nissan Chemical Co., Ltd.) 10.5 g Ethyl acrylate / methacrylic acid (97) / 3) Copolymer latex 9.7 g-Gelatin The coating amount of the emulsion layer was adjusted to 2.6 g / m ² . Hardener (1,2-bis (vinylsulfonylacetamide) ethane) The swelling ratio was adjusted to 230%.

[0035]

[Chemical 9]

<Preparation of Surface Protective Layer Coating Liquid> Each component was adjusted to have the following coating amounts.・ Gelatin 650 mg / m ²・ Sodium polyacrylate (average molecular weight 400,000) 18 ・ Butyl acrylate / methacrylic acid (4/6) copolymer latex (average molecular weight 120,000) 120 ・ Coating aid-I 18 ・Coating aid-II 45-Coating aid-III 0.9-Coating aid-IV 0.61-Coating aid-V 26-Additive-III 1.3-Polymethyl methacrylate (average particle size 2.5 μm ) 87 ・ Proxel 0.5 ・ Potassium polystyrene sulfonate (average molecular weight 600,000) 0.9 (adjusted to pH 7.4 with NaOH)

[0037]

[Chemical 10]

(Preparation of coating liquid for back surface) <Antihalation layer> (1) Preparation of Dye Dispersion L Dodecylbenzene prepared by dissolving 2.5 g each of the following Dye-I and Oil-I and II in 50 cc of ethyl acetate. 90 g of an 8% gelatin aqueous solution containing 1.5 g of sodium sulfonate and 0.18 g of methyl p-hydroxybenzoate
The mixture was mixed at 0 ° C and stirred at high speed with a homogenizer. After completion of high-speed stirring, reduce pressure at 60 ° C using an evaporator,
92 wt% of ethyl acetate was removed. Thus, a dye dispersion L having an average particle size of 0.18 μm was obtained. (2) Preparation of coating liquid The coating liquid was adjusted so that each component had the following coating amount.・ Gelatin 1.5 g / m ²・ Dextran (molecular weight 39,000) 0.3 g / m ²・ Phosphoric acid 5.2 mg / m ²・ Snowtex C 0.5 g / m ²・ Ethyl acrylate / methacryl Acid (97/3) copolymer latex 0.5 g / m ² · Proxel 4.2 mg / m ² · Dye dispersion L 8.0 g / m ² · Dye-II 100 mg / m ² · Dye-III 42 mg / m ² · Dye-IV 23 mg / m ² · Hardener · 1,2-bis (vinylsulfonylacetamido) ethane 40 mg / m ² Here, the coating amount of Dye-II is 50 g / m ² , Dye-III A coating solution was prepared so that the coating amount was 27 mg / m ² . When applied, the wavelength is 300 nm or more and 450 n
The maximum transmission absorption density of the backing layer at m or less was 0.55 as measured by a spectrophotometer. Further, when was applied, it was 0.35.

[0039]

[Chemical 11]

<Surface protection layer> Each component was adjusted so as to have the following coating amount.・ Gelatin 1300 mg / m ²・ Polymethylmethacrylate (average particle size 6.6 μm) 20 (average particle size 0.75 μm) 81 ・ Coating aid-I 20 ・ Coating aid-II 40 ・ Coating aid-III 6・ Coating aid-IV 9 ・ Coating aid-VI 1.7 ・ Coating aid-VII 13 ・ Proxel 1.3 ・ Potassium polystyrene sulfonate (average molecular weight 600,000) 2 ・ NaOH 2.5

[0041]

[Chemical 12]

(Preparation of Support) Support A: Commercially available polyethylene terephthalate was biaxially stretched and heat set according to a conventional method to obtain a film having a thickness of 183 μm. Support B: Commercially available polyethylene-2,6-naphthalate is melted at 300 ° C. and then extruded from a T-shaped die at 140 ° C.
Was longitudinally stretched 3.3 times, and then laterally stretched 3.3 times, and further heat-set at 250 ° C. for 6 seconds to obtain a 183 μm film. Support C: 150 pellets of polyethylene terephthalate and polyethylene-2,6-naphthalate were previously prepared.
After vacuum drying at 4 ° C for 4 hours, the mixture was kneaded and extruded at 280 ° C using a biaxial kneading extruder, and then pelletized. This pellet was formed into a film in the same manner as the support B. Corona discharge was applied to each support. For the corona discharge treatment, use a solid state corona treatment machine 6KVA model manufactured by Pillar Co., 30 cm
The width support is treated at 20 m / min. At this time, the object to be processed is 0.375 KV · A ·
Min / m ² was processed. The discharge frequency during processing is 9.6.
KHz, the gap clearance between the electrode and the dielectric roll was 1.6 mm. Next, a first undercoating liquid having the following composition was applied by a wire bar coater so that the applied amount was 5.1 cc / m ^2, and dried at 175 ° C. for 1 minute. Further, a first undercoat layer was similarly provided on the opposite surface. The polyethylene terephthalate used was Dye-I.
Was used in an amount of 0.04 wt%. -Butadiene-styrene copolymer latex solution (solid content 40% butadiene / styrene weight ratio = 31/35) 79 cc-2,4-dichloro-6-hydroxy-s-triazine sodium salt 4% aqueous solution 20.5-Distillation Water 900.5 * For the latex solution, the following emulsifying dispersant was used in an amount of 0.4 wt% based on the latex solid content.

[0043]

[Chemical 13]

(Preparation of Photographic Material) The backside antihalation layer and the surface protective layer were coated on the support A prepared as described above, and then the emulsion layer and the surface protective layer were coated on the opposite side by the simultaneous extrusion method. A photographic material A- was prepared. The amount of silver coated on the emulsion side was 2.8 g / m ² . Further, photographic materials A to C- were prepared by coating the same on Supports A to C using the back surface antihalation layer.

(Process-1) <Automatic processor> CEPRO manufactured by Fuji Photo Film Co., Ltd.
The transport motor was speeded up by modifying the drive motor and gear of SM. <Developer concentrate> Potassium hydroxide 56.6 g Sodium sulfite 200 Diethylenetriaminepentaacetic acid treatment 6.7 Potassium carbonate 16.7 Boric acid 10 Hydroquinone 83.3 Diethylene glycol 40 4-Hydroxymethyl-4-methyl-1-phenyl -3-Pyrazolidone 22 5-methylbenzotriazole 2 processing aid-I 0.6 Bring to 1 liter with water (adjust to pH 10.60).

[0046]

[Chemical 14]

<Concentrated solution of fixing solution> Ammonium thiosulfate 560 g Sodium sulfite 60 Ethylenediaminetetraacetic acid / disodium dihydrate 0.1 Sodium hydroxide 24 Make up to 1 liter with water (adjust to pH 5.10 with acetic acid). When the development processing was started, each tank of the automatic processor was filled with the following processing solutions. Development tank: 333 cc of the concentrated developer solution, 667 cc of water, and 10 cc of a starter containing 2 g of potassium bromide and 1.8 g of acetic acid were added to adjust the pH to 10.25. Fixing tank: 200 cc of the above fixing solution concentrate and 800 water
cc. Processing speed: Dry to Dry was adjusted to 30 seconds. Development temperature ・ ・ ・ 35 ℃ Fixing temperature ・ ・ ・ 35 ℃ Drying temperature ・ ・ ・ 45 ℃ Replenishing amount ・ ・ ・ Developer 22cc / 10 × 12 inches Fixer 30cc / 10 × 12 inches

(Process-2) <Automatic developing machine> The same one as in Process-1 was used. <Developer replenisher> Potassium hydroxide 28.0 g Sodium sulfite 75.0 Diethylenetriaminepentaacetic acid treatment 2.0 Sodium carbonate 30.0 Hydroquinone 18.0 Diethylaminoethyl-5-mercaptotetrazole 0.1 Potassium bromide 1.0 Tri Ethylene glycol 6.0 g 5-Nitroindazole 0.3 Acetic acid 40.0 1-Phenyl-3-pyrazolidone 3.5 Processing aid-I 0.2 Bring to 1 liter with water (adjust to pH 10.3 with sodium hydroxide) To). <Fixing solution replenisher> Ammonium thiosulfate 96.4 g Ethylenediaminetetraacetic acid / disodium dihydrate 0.025 Sodium metabisulfite 22.0 Make up to 1 liter with water (adjust to pH 5.0 with sodium hydroxide). . When the development processing was started, each tank of the automatic processor was filled with the following processing solutions. Developing tank: 4.0 g of potassium bromide and 3.5 g of acetic acid were added to 1 liter of the developer replenisher. Fixing tank: 1 liter of the above fixer replenisher. Processing speed: Dry to Dry was adjusted to 45 seconds. Development temperature ・ ・ ・ 35 ℃ Fixing temperature ・ ・ ・ 32 ℃ Drying temperature ・ ・ ・ 45 ℃ Replenishing amount ・ ・ ・ Developer 15cc / 10 × 12 inch Fixer 20cc / 10 × 12 inch

(Evaluation of Photographic Performance) A photographic material was made to emit light on a CRT (light emitter P-45) for a medical multi-camera so as to have a density gradient and exposed for 1 second from the emulsion surface side. An evaluation was made. The sensitivities are based on the photographic material A- in each processing, and are indicated by the reciprocal of the ratio of the exposure amount giving a density of 1.0 in addition to the fog.

(Evaluation of Sharpness) JIS-Z-8105-
MTF (20 cycles / mm) at an image density of 1.5 was measured by using a standard light source B described in 2015 as a light source and a Ratten filter 47B ”(manufactured by Eastman Kodak Company). As the treatment, the above treatment-1 was used.

(Evaluation of residual color) 30.5 cm × photographic material
Each piece was cut into 25.4 cm, washed with water at 5 ° C. and subjected to each treatment, and the degree of residual color of the light-sensitive material was visually evaluated according to the following criteria. ◎ …… There is almost no residual color. ○ …… I don't mind the slight residual color. Δ: The color remains, but it is practically acceptable. ×: Many residual colors are not possible.

(Evaluation of unevenness of dye transfer) A photographic material was set at 25 ° C.
The humidity is adjusted to 70% RH, the bag is sealed in a moisture-proof bag, and the bag is sealed. A pressure of 4 kg / m ² is applied from the outside of the bag at 50 ° C for 10 days, and then the bag is opened and the transfer of the dye to the emulsion surface is visually evaluated. did. Also,
Similarly, the aged photographic material was made to emit a CRT (light emitter P-45) for a medical multi-camera so that the density became 1.0, and the emulsion surface side was exposed for 1 second. Was evaluated. The evaluation criteria are as follows. ◎ …… There is almost no transcription. ○: Transferred slightly, but there was no density unevenness after development. Δ: Practically acceptable although density unevenness occurs after development. ×: Density unevenness after development is severe and impossible.

The results are shown in Table 1. It can be seen that, in the range of the present invention, all of the sensitivity, residual color, sharpness, and dye transfer unevenness are good. In particular, a great effect can be obtained in the low replenishment treatments of treatments-2 and 3 and in the light-sensitive material containing less dye in the backing layer.

[0054]

[Table 1]

Example 2 (X-ray sensitivity) X-ray generator MGU-10C manufactured by Toshiba Corp.
With a tube voltage of 26 kV and a current of 10 mA for 1.0 second through an acrylic wedge. HR made by Fuji Photo Film Co., Ltd.
The light-sensitive materials A- and A to C- prepared in Example 1 were exposed through a mammo cassette and HR-mammo fine screen. Then, the treatment-I of Example 1 was performed to evaluate the sensitivity. In addition to the fog based on photographic material A-
It is shown as the reciprocal of the ratio of the exposure dose that gives a density of 0.

(Distinguishability) X-ray generator MG manufactured by Toshiba Corporation
U-10C and C.I. G. A mammography phantom manufactured by R Co. was exposed to light-sensitive materials A- and A-C-through the same screen and cassette as those used for evaluation of X-ray sensitivity.
Then, the treatment-I of Example 1 was performed. The tube focus size was 0.4 mm, the tube voltage was 26 kV, the current was 100 mA, and the exposure time was adjusted for each sample so that the back density was 1.3. The distinctiveness is determined by using a magnifying glass of 5 times, the depiction of the skin line, 125 to 177 μm.
Depiction of micro calcification, fine line resolution,
The contrast resolution was evaluated. Skin line,
The descriptiveness of the micro calcification is indicated by ⊚ (visible), ○ (visible), Δ (hard to see), and x (not visible). The fine line resolution showed identifiable books / mm (however, those not visible were marked x). Contrast resolution is 2 x-ray absorption difference (monochromatic 20 kV x-ray)
%, The depictability of the pattern having a diameter of 1 mm was evaluated, and indicated by ⊚ (good), ◯ (visible), Δ (hard to see), and x (not visible). The results are shown in Table 2.

[0057]

[Table 2]

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[Procedure amendment]

[Submission date] February 2, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

(Preparation of Support) Support A: Commercially available polyethylene terephthalate was biaxially stretched and heat set according to a conventional method to obtain a film having a thickness of 183 μm. Support B: Commercially available polyethylene-2,6-naphthalate is melted at 300 ° C. and then extruded from a T-shaped die at 140 ° C.
Was longitudinally stretched 3.3 times, and then laterally stretched 3.3 times, and further heat-set at 250 ° C. for 6 seconds to obtain a 183 μm film. Support C: 150 pellets of polyethylene terephthalate and polyethylene-2,6-naphthalate were previously prepared.
After vacuum drying at 4 ° C for 4 hours, the mixture was kneaded and extruded at 280 ° C using a biaxial kneading extruder, and then pelletized. This pellet was formed into a film in the same manner as the support B. The support was glow discharge treated as follows. Place a semi-circular 40 cm long rod electrode with a diameter of 3 cm at 10 cm intervals on an insulating plate and place the electrode plate in a vacuum. 15 cm away from this electrode surface so that it faces the electrode surface. The support was run at 20 m / min. Immediately before the support passed over the electrode, a heating roll with a temperature controller having a diameter of 50 cm was set at 120 ° C., and the heating roll was arranged so as to come into contact with 3/4 circumference. The glow discharge is 0.
It was performed by applying a voltage of 2000 V to the electrode while maintaining the pressure at 1 Torr. At this time, the electrode current was 0.5A. At this time, the support was treated with 0.125 KVA min / m ² . Next, a first undercoating liquid having the following composition was applied by a wire bar coater so that the applied amount was 5.1 cc / m ^2, and dried at 175 ° C. for 1 minute. Further, a first undercoat layer was similarly provided on the opposite surface. The polyethylene terephthalate used was Dye-I.
Was used in an amount of 0.04 wt%. -Butadiene-styrene copolymer latex solution (solid content 40% butadiene / styrene weight ratio = 31/35) 79 cc-2,4-dichloro-6-hydroxy-s-triazine sodium salt 4% aqueous solution 20.5-Distillation Water 900.5 * For the latex solution, the following emulsifying dispersant was used in an amount of 0.4 wt% based on the latex solid content.

Claims (4)

[Claims] 1. A silver halide photographic light-sensitive material for CRT photography having at least one light-sensitive silver halide emulsion layer on one side of a support, wherein the support contains polyethylene naphthalate or polyethylene naphthalate. A silver halide photographic material for CRT photography, which is composed of molecules. 2. A radiographic single-sided light-sensitive material having at least one photosensitive silver halide emulsion layer on one side of a support, wherein the support comprises polyethylene naphthalate or an organic polymer containing polyethylene naphthalate. A radiographic one-sided light-sensitive material characterized by: 3. The halogenated product according to claim 1, wherein 50% or more of the silver halide grains contained in the emulsion layer are tabular grains having an aspect ratio of 3 or more. Silver photographic light-sensitive material. 4. A silver halide photographic light-sensitive material as claimed in claim 1 or / and 2, which is processed by an automatic processor having a developer replenishing amount of 25 ml or less per 4 sheets.