The Mead Corporation

Amy L Burkholder

Paul C Adair

Richard F Wright

Mary M Stanley

Homer G Duda

Jesse Hipps, Sr

Kerry Kovacs

William H Simpson

Teresa M Thomas

Russell K Messer, Ii

A photosensitive composition resistant to short time scale reciprocity failure is disclosed. The composition comprises microcapsules having an internal phase containing an image forming agent; a photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and a photoinitiator; and a viscosity modifier for increasing the viscosity of said internal phase.

Prevention of short time scale reciprocity failure by viscosity control

A photographic material exhibiting improved photographic characteristics comprising a photographic material comprising a support having a layer of microcapsules thereon, and an image-forming agent being associated with said microcapsules, said microcapsules including a mixture of a first subset of microcapsules and a second subset of microcapsules, said first and second subsets of microcapsules being associated with an image-forming agent for the same color, and said first subset of microcapsules providing a higher film speed than said second subset of microcapsules when said first and second subsets of microcapsules are exposed to a broad band white light source and developed under identical conditions.

Microcapsule imaging system having improved dynamic range

Imaging systems employing photosensitive microcapsules having improved film speed are disclosed wherein the microcapsules contain a 4-(4'-aminophenyl)-pyridine compound in the internal phase as a color former.

Imaging systems employing photosensitive microcapsules containing

Photosensitive microcapsules having radiation absorbers associated therewith such that the sensitivity of the microcapsules is reduced over a portion of their spectral sensitivity range; the spectral sensitivity of the microcapsules is thereby adjusted such that three sets of microcapsules having distinctly different spectral sensitivities and individually containing color formers for full color imaging can be provided on a single support surface and discriminately exposed in a manner which corresponds to the red, green and blue components of an original.

Photosensitive microcapsules useful in polychromatic imaging having

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.

Non-aqueous silver halide diffusion imaging system

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.

Growing community of inventors

Chillicothe, OH, United States of America

Amy L Burkholder