Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
  • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
  • G03F7/004—Photosensitive materials
  • G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/1053—Imaging affecting physical property or radiation sensitive material, or producing nonplanar or printing surface - process, composition, or product: radiation sensitive composition or product or process of making binder containing
  • Y10S430/1055—Radiation sensitive composition or product or process of making
  • Y10S430/114—Initiator containing
  • Y10S430/12—Nitrogen compound containing

Definitions

• the present invention' relates to colloid layers sensitized by means of aromatic nitro-compounds, and to a process of preparing tanned pictures therefrom.
• photographic materials with excellent properties are obtained by rendering colloid layers sensitive to light by the addition of aromatic nitro-compounds capable of yielding, when exposed to light, products which have tanning properties for the colloid. It has further been found that distinguished tanned pictures or copies can be obtained by exposing the said light sensitive colloid layers to light beneath r a pattern and then operating on them in a manner known per se, so as to produce tanned copies.
• the colloid layers according to the invention are rendered light sensitive by various aromatic nitro compounds which, when exposed to' light, yield decomposition products capable of tanning the colloid substance of the layer.
• nitro derivatives of the benzene and naphthalene series may be employed as light sensitive substances.
• a-nitro-naphthaiene compounds which are substituted by a carboxylic group or a suite group, preferably in the orthoor in the periposition to the nitro group 'have proved very suitable.
• nitro compounds which are likewise soluble in water, such as, for example, l-nitronaphthaiene-il-sulphonic acid, .l-nitronaphthalene-2-sulphonic acid, l-nitronaphthalene-dcarboxylic acid, l-nitronaphthalene-3.8-disulphonic acid, l-nitro-B-methylnaphthaleneisulphonic acid.
• the said nitro compounds may also have further substltuents (such as, for example, halogens).
• l-methyl-8-nitronaphthalene and l-nitronaphtha.lene-8-carboxylic acid are, for example, suitable.
• the light sensitiveness may be increased by the addition of metallic salts, for example cerium salts, or of amines, for example amline, to the layers, or the-exposed layers maybe ai'tertreatedwith salts, such as chromates, cerium salts and so forth.
• the capability of adsorbing moisture and the solubility of the colloidal substance employed is lessened at the places struck by the light.
• the colloid not tanned by the action of light can be removed while the tanned colloid at the places struck by the light remains.
• the obtained relief may for example be coloured, or may be employed for direct printing according to the manner of the photographic printing process. If the colloid contains a pigment in addition to the light sensitive substance pigment prints can be produced. If the layer is applied in suitable manner to metal or stone, autotypes or photo lithographs can be produced. Layers of this kind are also suitable for copper plate intaglio printimage, is transferred by means of a 1% solution of cerium-chloride to transfer paper and is developed with water at C.
• a positive laterally inverted copy of the original is obtained.
• the transferring operation may advantageously also be carried outwith weakly alkaline solutions (for example an ammonia solution)
• weakly alkaline solutions for example an ammonia solution
• 1.2-nitronaphthalene sulphonic acid and the 1.3.8-nitronaphthalene disulphonic acid or their salts respectively may be employed.
• Pigment paper of commercial use is bathed in a solution of 6 grammes of the sodium salt of l-nitro-8-methylnaphthalene-4-sulphonic acid in 100 grammes of water until it is stretched completely. The paper is then pressed on a glass base with its gelatinized side and dried without heating. A stable light sensitive paper is obtained. which may be employed in the usual manner.
• 3 grammes of hard gelatine are dissolved in 40 grammes of water and the solution is mixed with 3 grammes of finely powdered asphalt.
• a solution of 0.8 grammes of the sodium salt of 1-nitronaphthalene-8-carboxylic acid in 50 grammes of water is then added.
• This emulsion is poured on to a zinc plate in a thin layer and dried. The material is exposed beneath a negative and washed out with warm water. The dried layer is made etch-fast by a heating process and the zinc plate is then etched in the customary manner.
• R is a naphthalene residue with the nitro group in alpha-position
• X stands for a member of the group consisting of the COOH group and the SOaH group, under a pattern and then dissolving the colloid not tanned by the action of 3.
• Process for the production of tanned pictures which comprises exposing a gelatine layer sensitized by means of ortho-nitrobenzyl alcohol under a pattern and then dissolving the colloid not tanned by the action of light.
• Process for the production of tanned pictures which comprises exposing a light-sensitive layer comprising a colloidal substance capable of being tanned, a pigment and a light-sensitive nitro compound of the following general formula:
• R is a naphthalene residue with the nitro group in alpha position
• X stands for a member of the group consisting of the COOH group and the 803K group, under a pattern and then dissolving the colloid not tanned by the action of light.

Landscapes

• Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• General Physics & Mathematics (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=25984794

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (1)

• 1934
  • 1934-01-19 DE DEK132896D patent/DE615958C/de not_active Expired
• 1935
  • 1935-01-10 US US1238A patent/US2099404A/en not_active Expired - Lifetime
  • 1935-01-11 NL NL72062A patent/NL40280C/xx active
  • 1935-01-12 BE BE407273D patent/BE407273A/xx unknown
  • 1935-01-14 GB GB1235/35A patent/GB434073A/en not_active Expired
  • 1935-01-15 FR FR784190D patent/FR784190A/fr not_active Expired

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