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    • 1940-Jun-17

    General view of a washing tub in use at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. Per notations accompanying the photograph, constant agitation and continual charges of water were used…

    • 1940s

    General view of weigh-tanks for caustic soda and ethyl cellulose at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. Per notations accompanying the photograph, caustic soda and ethyl cellulose…

    • 1940-Jun-17

    Close-up view of several rolls of sheeted cotton linters mounted on spindles at the Hercules Powder Company's Ethyl Cellulose plant in Hopewell, Virginia. Per notations accompanying the photograph, the cotton was…

    • 1940s

    General view of the interior of a portion of the Hercules Powder Company plant facilities in Hopewell, Virginia, with view of assorted industrial apparatus and machinery and several unidentified employees. The Hopewell…

    • 1940s

    General view of an unidentified female employee inspecting a treating tub used to purify ethyl cellulose at the Hercules Powder Company plant in Hopewell, Virginia. The Hopewell plant commonly produced ethyl cellulose,…

    • 1949-Jan

    General view of an insulated test chamber used in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey to determine the impact resistance of plastics at sub-normal temperatures. Per…

    • 1949-Jan

    General view of employee Felix Nakielny removing a toilet seat cover from the dimension stability test cabinet used in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations…

    • 1949-Jan

    Close-up view of operator Felix Nakielny removing a test piece from an injection mold apparatus used in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the…

    • 1945-Jan

    General view of employee Felix G. Nakielny operating a two-roll mill in the Experimental Plastics laboratory at the Hercules Powder Company plant in Parlin, New Jersey. According to the caption that accompanied this…

    • 1949-Jan

    Close-up view of an extruder in use in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Extruders were commonly used to process and shape a variety of raw materials produced at the…

    • 1949-Jan

    Close-up view of V.F. Kurowsky operating a flow measuring device used to identify and control the ratio of base material to plasticizer in cellulose molding compounds produced in the Plastics Laboratory at the Hercules…

    • 1949-Jan

    General view of operator J.P. Deran removing injection molded cellulose materials from a 4-ounce Reed Prentice molding apparatus at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the…

    • 1949-Jan

    Close-up view of the take-off jig used to control extruded shapes on a National Rubber 2-inch extruder in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. The employee visible in the…

    • 1949-Jan

    Close-up view of a tumbling shaker used in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey to dissolve plastic materials in solvents. Per notations accompanying the photograph, the…

    • 1949-Jan

    Close-up view of V.F. Kurowsky operating a flow measuring device used to identify and control the ratio of base material to plasticizer in cellulose molding compounds produced in the Plastics Laboratory at the Hercules…

    • 1949-Jan

    Close-up view of an extruder in use in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. An unidentified employee is seen pouring raw material into the hopper; the material is…

    • 1949-Jan

    Close-up view of operator L.F. Strugala using a two-roll mill in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the photograph, the two-roll mill was used…

    • 1949-Jan

    Close-up view of the take-off jig used to control extruded shapes on a National Rubber 2-inch extruder in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. The employee visible in the…

    • 1951-May-01

    Retouched photograph with a general view of an extruder used at the Hercules Powder Company plant in Parlin, New Jersey. Extruders were commonly used to process and shape a variety of raw materials produced at the…

    • 1949-Jan

    Close-up view of J.P. Drew operating a milling cutter used in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the photograph, the cutter was used to cut…

    • 1949-Jan

    Close-up view of operator L.F. Strugala using a two-roll mill in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the photograph, the two-roll mill was used…