Process for developing blueprints utilizing ammonia developer containing sodium chlorite to reduce ammonia odor in the developed blueprint paper

A process for reducing the ammonia odor in blueprints comprising the step of developing the blueprints with an ammonia developing solution that comprises an aqueous solution of sodium chlorite in an amount that is effective to reduce the ammonia odor in the developed blueprint paper without eliminating the characteristic warning odor of ammonia in the developing solution.

A process for developing blueprints with an ammonia based developer, wherein the odor of ammonia in the finished blueprints is reduced, comprising the step of treating blueprint paper with an ammonia based developer that incorporates an effective amount of sodium chlorite in the developer, the amount of sodium chlorite used being sufficient to reduce the odor of ammonia in developed blueprints but being insufficient to materially affect the developing performance of the ammonia developer.

A process for developing blueprints comprising treating exposed blueprint paper with vapor from an aqueous solution of ammonia, the improvement comprising admixing sodium chlorite in the aqueous solution in an amount sufficient to reduce the ammonia odor from the developed blueprints without eliminating the ammonia odor from the aqueous solution.

A process for developing blueprints comprising developing blueprint paper in a developing chamber by ammonia vapor obtained from a pressurized source of liquid ammonia, introducing water into the developing chamber and heating the water in order to produce a humidified atmosphere in the developing chamber, the improvement comprising incorporating an effective amount of sodium chlorite in the water introduced into the developing chamber to reduce the odor of ammonia in the developed blueprints.

A method for reducing the ammonia odor from prints developed by exposing photosensitive paper to ammonia vapor comprising exposing the prints to the vapor products of an aqueous solution of sodium chlorite in an amount sufficient to reduce the odor in the prints.

A process for developing blueprints with an ammonia-based developer comprising treating exposed blueprint paper with ammonia vapor and a vaporized aqueous solution of sodium chlorite, the amount of sodium chlorite being sufficient to reduce the odor of ammonia in the developed blueprints.

A process for reducing the ammonia odor in blueprints that are developed by exposing the blueprints in a developing chamber to the vapor products of an aqueous ammonia developing solution, comprising admixing with the ammonia developing solution an effective amount of sodium chlorite to reduce the odor of ammonia in the developed blueprints.