Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C9/00—Stereo-photographic or similar processes
  • G03C9/06—Anaglyph
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/46—Subtractive processes not covered by the group G03C7/26; Materials therefor; Preparing or processing such materials

Definitions

• the present invention relates to improvements in the production and application of layers sensitive to light.
• These particles are produced by dispersing into fine globular particles, in the dry or wet way, organic colloidal substances such as gelatine, collodion and the like, or solutions of the same, in which globular particles light-sensitive substances, such as metal halides for example light-sensitive silver or mercury compounds and at the same time substances which are not sensitive to light, such as water-insoluble dyestuflfs, substances acting as pigments and resinous substances and the like are dissolvedor suspended.
• the dispersion may be effected in any known or suitable manner either by atomization with air or by emulsification in any inert liquid,
• layersof twm kin s of globules are employed, each of which is sensitive to light in a diiferent range of the spectrum and each of which is coloured complementarily tothe other.
• the one kind of globules contains a red plgment
• the other kind of globules contains a blue green pigment.
• the red globules contain a substance which for example is particularly sensitive to red light
• the blue green globules contain one which is particularly sensitive to blue green light.
• two component pictures of a stereoscopic photograph are then printed onto such a layer in a suitable manner, for exam le onefbehind a red filter and the other behind a green filter or with red and green light respectively, twoj stereoscopic plctures are obtained after suitable treatment which are on the same substratum, each picture being built up of individual points of the picture which lie in between those of the other picture.
• the process may be employed for the production of layers which give pictures capable of being etched and suitable for the preparation of printing blocks without the employment of a screen, the layers being pro-.
• a light sensitive substance for example silver bromide and also a substance not attacked by normal etching agents for examplexa pigment or a resin and also asphaltum.
• the production o the final picioo ture can be performed in various manners.
• the development can be performed in such a manner that either the single globules the light sensitive components of which have been influenced by the exposure, are wholly removed from the layer-or only a part thereof corres onding to the action of the lightor the g obules, the light sensitive components of which have not been influenced by the exposure are removed.
• a further method consists in removing the colouring material and free metal formed from globules which have been influenced by the light during the exposure.
• a suitable method consists in" hardening the globules containing the free metal wholly or partially, depending on the quantity of free metal contained therein.
• the unhardened particles are removed, for example, by washing out in a manner similar to that employed in making the socalled carbon prints; the hardening can be performed, for example, with a dilute bichromate or with the hardening solutions usually employed in the brom oil printing process. In order to avoid the formation of the support, or their fragments, is removed.
• a halo i. e. the extension 'of the hardening efieet onto particles which do not contain free metal, it is advantageous to work at the lowest'suitable temperature.
• Quinone is for example a good hardening agent for the aforesaid pur ose.
• the layer is trans erred to-another support and developed in the manner usually employed in the carbon printing process and at the lowest suitable temperature.
• - Free metal which may be still present in the particles remaining on by any of the well-known a ents for dissolving silver and also metal ha ide, which might be formed during the hardening is removed by one of the usual fixing agents. According to the method of working a picture consisting of single coloured particles is formed which picture shows the complementary colours when a single primary development has been.
• a suitable bath for etching consists of hydrogen peroxide, sulphuric acid, copper sulphate and a small quantity of potassium bromide, the relative proportion of the said ingredients being varied according to the requirements.
• Another method which is particularly suitable for layers consisting of such single particles which contain a colouring materlal which, however, can be dissolved or decomposed by chemical agents, consists in developing in such a manner that the metal is formed and that either simultaneously, or by chemical aftertreatment, a removal or decomposition of the colouring matter in the particles, which have been influenced by the light, is performed without the removal of the whole particles.
• This eflect can be obtained by suitable developers which produce aporosity of the single particles, so that the colouring. matter can be washed out through the pores or decomposed by a suitable solution entering the particles through the pores.
• Example 1 minute into a solution of 24.3 grams of potassium bromide, 16 grams of potassium chloride and 0.8 gram of gelatine in 400 cubic ,centimeters of distilled water and 5 cubic centimeters of an alcoholic 1/1000 solution of Pinaflavol (Colour Index, 1924, No. 808a) Stirring is continued for about 5 minutes at the said temperature. The whole is then allowed to settle, and the precipitate is then washed three times by decantation with 1 litre of distilled water each time The precipitate is then warmed to about 50 C. and
• the resulting emulsion is green sensitized and contains a red pigment fast to light.
• a solution of 64 grams of silver nitrate in 640 cubic centimeters of distilled water is stirred in the course of 14 minutes at about 20 C. at dark green light, into a solution of 53.2 grams of potassium bromide and 0.5 gram of gelatine in 400'cubic centimeters of distilled water and 3 cubic centimeters of a' 1/1000 alcohnlic soluti n of Pinacyanol blue (Colour Index, 1924, o. 808). Stirring is continued for about 10 minutes at the said temperature; The precipitate is allowed to settle and is then washed three times by decantation with 1 liter of distilled water each The precipitate is then warmed at about C.
• Example 2 g In a similar manner, globules which have been prepared from pigment and silver bromide andgelatine for example as described in Examp e 1 may be employed for the preparation 0 anaglyphs. Silver halide collodion emulsions may, however, also be employed. A silver bromide collodion emulsion which has been rendered sensitive to red in any known or suitable manner for exam ple with Pinacyanol blue (Colour Index, 1924, N o. 809) and the blue sensitivity of which has been repressed, if desired by a yellow dyestuff, for --example Naphthol yellow, iscoloured red with the aid of a red pigment or the like.
• an emulsion which has been rendered sensitive to green with pinafiavol is coloured blue green with the'aid of a blue green pigment or the like.
• the two emulsions are atomized and the powders obtained are mixed in equal proportions and the mixture is spread out on a substratum.
• Example 4 A latent image obtained with a layer prepared in accordance with Examples 1 or 2 and consisting of a mixture of single particles of gelatine containing silver bromide the chromatic sensitivity of which is different, and which contain besides the silver bromide fragments, a corresponding different colouring matter is developed with a suitable nontanning developer, for exam le, with iron oxalate or amidol-sulphite a ter the layer has been superficially hardened in a bath of ethyl alcohol.
• the layer is then transferred onto a suitable support in the manner usually employed in carbon printing and developed on the said support with water at the lowest suitable temperature, which depends on the nature, i. e. on the flow-point, of the gelatine employed.
• Example 5 If the particles which are free from metallic silver in a layer as described in the foregoing example and exposed, are to be employed for building up the final picture the development can be performed in the following manner. After bathing the layer containing the latent image for about 20 seconds in pure 96 per cent ethyl alcohol and carefully drying. the latent image is developed by means of a developer which, however,
• the picture which may be formed by the action of the etching solution is removed by fixation with the above mentioned fixing bath. After rinsing for about 10'minutes the picture can be dried.
• Example 6' A In the development of a latent image from f a layer prepared in the aforedescribed manmen the single particles of which consist, however, of collodion instead of gelatine and which contain a colouring matter, which is insoluble in water, but soluble for example in alcohol, the following method can be employed.
• the latent image is developed with a caustic developer, for example, with a developer containing pyrocatechin and caustic soda, whereby the collodion becomes porous of those particles or the parts thereof in which metallic silver has been produced by
• a layer is prepared consisting of particles of an emulsion containing silver bromide, gelatine and very finely dispersed asphaltum.
• the layer is exposed and developed and then etched in the manner described in Example 5.
• a metal sheet such as zinc
• it is dried and slightly heated until it sticks uniformly to the metal sheet.
• the picture thereon consists of single small particles of asphaltum and the etching of the metal sheet can be-performed in any convenient method 'usually applied for such purposes.
• the process for the production and application of layers sensitive-to light which comprises incorporating a plurality of portions of a liquefied organic colloidal sub stance, each with a light-sensitive silverhalidewhich is differently and particularly sensitive to the different rays of light for each portion of the colloidal substance, thus forming a plurality of photographic emulsions, incorporating each of the said photographic emulsions with a different, finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, dispersing reach of the said photographic emulsions separately into fine globular particles and spreading the resulting globules to form an inhomogeneous light-sensitive layer onto a substratum having a superficial layer which is sticky with respect to the said globules.
• the process for the production and application of layers sensitive to light which comprises incorporating a plurality of portions of a liquefied organic colloidal substance each with a lightsensitive silver halide which is differently and particularly sensitive to a certain spectral range for each portion of the colloidal substance, thus forming a plurality of photographic emulsions, incorporating each of the said photographic emulsions with a different, finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, dispersing each of the said photographic emulsions separately into fine globular particles and spreading the resulting globules to form an inhomogeneous light-sensitive layer onto a substratum having a superficial layer which is sticky with respect to the said globules.
• the process for the production and application of layers sensitive to light which comprises incorporating a plurality of portions of a liquefied organic colloidal substance each with a light-sensitive silver halide which is difl'erently and particularly sensitive to a particular colour, complementary in at least two of said portions of the colloidal substance, thus forming a plurality of photographic emulsions, incorporating each of the said photographic emulsions with a difierent, finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, dispersing each of the said photographic emulsions separately into fine globular particles and spreading the resulting globules to form an inhomogeneous light-sensitive layer onto a substratum having a superficial layer which is sticky with respect to-the said globules.
• the process for the production and application of layers sensitive to light which comprises incorporating a plurality of portions of a liquefied organic colloidal substance each with a light-sensitive silver halide which is differently and particularly sensitive to a particular colour complementary in at least two of said portions of the colloidal substance, thus forming a plurality of photographic emulsions, incorporating each of the said photographic emulsions with a difierent, finely divided water-insoluble colouring matter indiflerent to light and practically inert to the said silver halide, said colouring matter having a shade complementary in each case to each of the said complementary colours, respectively, dispersing each of the said photographic emulsions separately into fine globular particles and spreading the resulting globules to form an inhomogeneous light-sensitive layer onto a substratum having a superficial layer which is sticky with respect to the said globules,
• each of the said photographic emulsions incorporating each of the said photographic emulsions with a different, finely divided water-insoluble colouring matter indifierent to light and practically inert to the said silver halide, dispersing each of the said photographic emulsions separately into fine globular particles and spreading the resultglobules to form an inhomogeneous light-sensitive layer onto a substratum having a superficial layer which is sticky with respect to the said globules, exposing said layer to the action of light through a coloured transparent picture, developing the latent image, thereby forming particles containing free silver and particles containing unaltered silver halide, and removing one of these groups of particles.
• the process for the production and application of layers sensitive to light which comprises incorporating a plurality of portions of a liquefied organic colloidal substance each with a light-sensitive silver halide which is differently and particularly sensitive to the different rays of light for each portion of the colloidal substance, thus forming a plurality of photographic emulsions, incorporating each of the said photographic emulsions with a different, finely divided water-insoluble colouring matter indifierent to light and practically inert to the said silver halide, dispersing each of the said photographic emulsions separately into fine globular particles and spreading the resulting globules to form an inhomogeneous light-sensitive layer onto a substratum hav ing a superficial layer which is sticky with respect to the said globules, exposing said layer to the action of light, developing the latent image, thereby forming particles con; taining free silver and particles containing unaltered silver halide, and removing the portion of the said particles which contains free
• an inhomogeneous, light-sensitive layer comprising. on a substratum which is sticky to the said layer, single globules of an organic colloidal substance, part of said globules containing a silver halide particularly sensitive to certain rays of light and a finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, and at least one other part of the said globules containing a silver halide which is particularly sensitive to other rays of light and another finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, and having a shade different from that of the other "colouring matter.
• an inhomogeneous, light-sensitive layer comprisin on a substratum which is sticky to the said layer, single globules of an organic colloidal substance, part of said globules con taining a silver halide particularly sensitive to a certain spectral range and a finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, and at least one other part of the said globules containing a silver halide which is particularly sensitive to another spectral range and another finely divided water-insoluble colouring matter indifferent to light and practically inert to the said silver halide, and having a shade different from that of the other colouring matter.
• an inhomogeneous,light-sensitive layer comprising, on a substratum which is sticky to the said layer, single globules of an organic colloidal substance, part of said globules containing a silver halide particularly sensitive to a certain spectral range, and a finely divided water-insoluble colouring matter in different to light and practically insert to the said silver halide, said colouring matter having a.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7189380

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (1)

• 0
  • NL NL31463D patent/NL31463C/xx active
• 1930
  • 1930-01-11 US US420278A patent/US1903783A/en not_active Expired - Lifetime
  • 1930-01-21 FR FR688591D patent/FR688591A/fr not_active Expired

Also Published As

Similar Documents