摘要:
Imaging systems employing photosensitive microcapsules having improved film speed are disclosed wherein the microcapsules contain a photosensitive composition in which the photoinitiator system includes a photobleachable sensitizer such as a 3-substituted coumarin compound; the invention is particularly useful in providing self-contained imaging systems which are sensitive at 390-500 nm but which can be photobleached to reduce background yellow; an imaging process including a photobleaching step following exposure and development is also disclosed.
摘要:
An imaging material and process employing photosensitive microcapsules useful in forming two or more image colors by exposure with an intensity or time modulated radiation source such as a laser; the imaging material comprises a support having at least two sets of photosensitive microcapsules on the surface, one set of microcapsules is made up of high speed microcapsules which are more sensitive to a predetermined actinic radiation than a second set of microcapsules made up of lower speed microcapsules; the microcapsules include a photosensitive composition which undergoes a change in viscosity upon exposure to actinic radiation; first and second image-forming agents are respectively associated with each set of microcapsules; the imaging material is useful in forming images of two or more colors by a process which comprises image-wise exposing the imaging material to actinic radiation at a first exposure amount which is substantially quantitatively different than the second exposure amount, and subjecting the exposed imaging material to a uniform rupturing force such as pressure.
摘要:
A self-contained silver halide diffusion transfer imaging sheet is provided which contains three layers on a substrate. The first layer is a silver halide emulsion formed in a non-ionic material. The intermediate layer is a water barrier. The third layer is a nucleating region which contains collodial silver. A developer, base and silver transport agent can also be located in these layers. For example, the base and silver transport agent can be located in the nucleating layer, with the developer located in the emulsion layer. After the emulsion is exposed to actinic radiation, a non-aqueous activating medium is supplied which initiates the development and diffusion transfer processes. The final result is a positive image in the nucleating layer.
摘要:
A self-contained silver halide diffusion transfer imaging sheet is provided which contains three layers on a substrate. The first layer is a silver halide emulsion formed in a non-ionic material. The intermediate layer is a water barrier. The third layer is a nucleating region which contains colloidal silver. A developer, base and silver transport agent can also be located in these layers. For example, the base and silver transport agent can be located in the nucleating layer, with the developer located in the emulsion layer. After the emulsion is exposed to actinic radiation, a non-aqueous activating medium is supplied which initiates the development and diffusion transfer processes. The final result is a positive image in the nucleating layer.
摘要:
A capsular imaging system wherein the imaging material comprises a support coated on one surface with a layer of capsules containing, as an internal phase, a radiation sensitive composition and a decolorizing agent; images are formed by a dry process wherein the aforesaid sheet is image-wise exposed; exposure of the sheet controls release of the decolorizing agent from the capsules which image-wise reacts with a dye layer and causes a color change. Embodiments are also disclosed in which the decolorizing agent inhibits or reverses the color forming reaction between a dye precursor and a dye developer.
摘要:
A developer sheet useful in forming images having a high density comprising a support having front and back surfaces; anda developer layer coated from a solution on said front surface, said developer layer comprising a particulate reactive material being capable of reacting with a substantially colorless chromogenic material upon contact and generating an image, a binder material, and a viscosity increasing additive is provided. The developer sheet is particularly useful in photosensitive microencapsulated imaging systems for forming overhead transparencies.
摘要:
A developer sheet comprising a support having a layer of a color developer on the surface thereof, said color developer being capable of reacting with a substantially colorless electron donating color former to produce a color image and being an acrylic or methacrylic polymer having pendant developer moieties (e.g., hydroxy aromatic or aromatic acid moieties such as salicylic or phthalic acid moieties) which are preferably metallated (e.g., zincated) or being the polymeric reaction product of vinyl salicylic acid or salt.
摘要:
The present invention provide a dye-sensitized photopolymerizable composition comprising a free radical addition polymerizable material, and a photoinitiator, the photoinitiator consisting essentially of a photoreducible dye, a thiol, and an N,N'-dialkylaniline.
摘要:
Methods for forming relief images are disclosed employing photosensitive microcapsules; typically, the internal phase of the microcapsules includes a photohardenable composition such as an ethylenically unsaturated compound and a photoinitiator; release of the composition is controlled by exposure and the application of a uniform rupturing force such as pressure; in one embodiment, the released composition functions as a resist image for subsequent processing with an etching agent such as an acid.
摘要:
An improved means for developing photosensitive sheets employing a microencapsulated radiation sensitive composition wherein the microcapsules typically contain a thermally activatable gas generating compound and following exposure the imaging sheet is heated to rupture the microcapsules and develop the image.