GB1020831A - A process for sensitising electrophotographic layers - Google Patents
A process for sensitising electrophotographic layersInfo
- Publication number
- GB1020831A GB1020831A GB20476/63A GB2047663A GB1020831A GB 1020831 A GB1020831 A GB 1020831A GB 20476/63 A GB20476/63 A GB 20476/63A GB 2047663 A GB2047663 A GB 2047663A GB 1020831 A GB1020831 A GB 1020831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- image
- dyestuff
- developed
- exposed
- processes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/09—Sensitisors or activators, e.g. dyestuffs
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/12—Recording members for multicolour processes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
1,020,831. Electro-photographic processes. AGFA A.G. May 22, 1963 [June 16,1962], No. 20476/63. Heading G2H. [Also in Division H1] An electrophotographic material is sensitized by forming an electrostatic charge image on the photo-conductive layer and treating the layer with a sensitizing dyestuff in such an amount that the sensitizing dyestuff is deposited in a practically invisible pattern corresponding to the image. The process is utilized in several ways. In the first, an unsensitized material is given a uniform negative charge, exposed to a picture image, and developed with a positively charged aerosol containing the sensitizing dyestuff. The material is allowed to stand in the dark for some hours and is then recharged negatively and exposed uniformly to a diffuse light source. When developed a reversed image of the original is formed. In the second use, an unsensitized material is negatively charged, exposed to a screen image, developed with a positively charged aerosol of the sensitizing dyestuff, allowed to stand in the dark, exposed to a picture image using light to which both sensitized and unsensitized regions of the plate are sensitive (perhaps to different extents), and developed to obtain a non-reversed half-tone image. In another screen process a multiple screen may be produced by using dyes which are sensitizers for different wavelengths, the differently sensitized regions being formed so that they do not, or at the most only partly, overlap. Materials of this type are used for the subsequent development of multicoloured images. In the particularly described embodiments development at all stages is carried out using electrostatically atomised positively charged aerosols but in general the dyestuff sensitizer may be applied to the photo-conductive layer by known processes using either solutions of the dyestuff or the solid dyestuff. Cascade and dust cloud processes are possible using the powdered dyestuff to form a dry powder image which is fixed by aftertreatment with a solvent, and processes may be used which depend on the different wetting capacities of charged and uncharged regions of the material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA40459A DE1267090B (en) | 1962-06-16 | 1962-06-16 | Process for the electrophotographic production of reversal images |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1020831A true GB1020831A (en) | 1966-02-23 |
Family
ID=6931986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20476/63A Expired GB1020831A (en) | 1962-06-16 | 1963-05-22 | A process for sensitising electrophotographic layers |
Country Status (5)
Country | Link |
---|---|
US (1) | US3298830A (en) |
BE (1) | BE635517A (en) |
CH (1) | CH436990A (en) |
DE (1) | DE1267090B (en) |
GB (1) | GB1020831A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1797353B1 (en) * | 1967-09-18 | 1973-06-28 | Commw Of Australia | METHOD OF COLOR SENSITIZATION OF ELECTROPHOTOGRAPHIC PARTIAL COLOR IMAGES |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3350202A (en) * | 1964-10-27 | 1967-10-31 | Union Carbide Corp | Method of xerographically photosensitizing planographic printing plates |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE566768A (en) * | 1957-04-17 | |||
BE576841A (en) * | 1958-03-20 | |||
US3041169A (en) * | 1958-03-28 | 1962-06-26 | Rca Corp | Reversal type electrostatic developer powder |
US3005726A (en) * | 1958-05-01 | 1961-10-24 | Xerox Corp | Process of developing electrostatic images |
US2979403A (en) * | 1958-10-24 | 1961-04-11 | Rca Corp | Electrostatic printing |
US2972304A (en) * | 1959-06-02 | 1961-02-21 | Eastman Kodak Co | Electrostatic printing |
-
0
- BE BE635517D patent/BE635517A/xx unknown
-
1962
- 1962-06-16 DE DEA40459A patent/DE1267090B/en active Pending
-
1963
- 1963-05-09 CH CH581163A patent/CH436990A/en unknown
- 1963-05-14 US US280433A patent/US3298830A/en not_active Expired - Lifetime
- 1963-05-22 GB GB20476/63A patent/GB1020831A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1797353B1 (en) * | 1967-09-18 | 1973-06-28 | Commw Of Australia | METHOD OF COLOR SENSITIZATION OF ELECTROPHOTOGRAPHIC PARTIAL COLOR IMAGES |
Also Published As
Publication number | Publication date |
---|---|
BE635517A (en) | 1900-01-01 |
DE1267090B (en) | 1968-04-25 |
CH436990A (en) | 1967-05-31 |
US3298830A (en) | 1967-01-17 |
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