Method of producing colloid relief images

Abstract

Abstract IN A PROCESS FOR PRODUCING A COLLOID RELIEF IMAGE BY EXPOSING A LIGHT SENSITVE COLLOID LAYER TO THE ACTION OF LIGHT TO PRODUCE A DIFFERENTIALLY HARDENED COLLOID LAYER CONTAINING HARDENED PORTIONS WHICH HAVE BEEN EXPOSED TO LIGHT AND UNHARDENED PORTIONS, THE IMPROVEMENT WHICH COMPRISES REMOVING THE UNHARDENED PORTIONS BY CONTACTING THE DIFFERENTIALLY HARDENED COLLOID LAYER WITH A HOT AQUEOUS SALT SOLUTION, E.G., A CONCENTRATED SODIUM CHLORIDE SOLUTION, TO SOFTEN THE UNHARDENED PORTIONS, FOLLOWED BY TREATMENT OF THE DIFFERENTIALLY HARDENED COLLOID LAYER WITH COLD WATER TO REMOVE THE SOFTENED UNHARDENED PORTIONS OF THE COLLOID LAYER ESSENTIALLY AS PARTICLES SUSPENDED IN THE WATER, AND PERMITTING REUSE OF BOTH THE HOT SALT SOLUTION AND THE COLD WATER, FOLLOWING REMOVAL OF THE SUSPENDED PARTICLES, FOR FURTHER PROCESSING TO PROVIDE COLLOID RELIEF IMAGES AS ABOVE DESCRIBED.

Inventors

• 👤 Bela Gaspar

Bibliographic Details