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…

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…

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…

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…

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…

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…

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…

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…

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

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…

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…

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…

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…

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…

Close-up view of several testing samples in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the photograph, the samples were placed in a testing box and…

Two views of a General Electric Recording Spectrophotometer in use in the Plastics Laboratory at the Hercules Powder Company plant in Parlin, New Jersey. The employee visible in the first photograph is identified as…

General view of a machine used to mold Penton, a chlorinated polyether used as an ingredient in protective coatings for structural steel and other metals, papers, cardboard, and plastics, at the Hercules Powder Company…

General view of a ring closure reactor used in the production of Penton, a chlorinated polyether used as an ingredient in protective coatings for structural steel and other metals, papers, cardboard, and plastics, at…

General view of an acetylation unit used in the production of Penton, a chlorinated polyether used as an ingredient in protective coatings for structural steel and other metals, papers, cardboard, and plastics, at the…

Close-up view of assorted valves, pipes, and fittings at the Hercules Powder Company plant in Parlin, New Jersey. Per notations accompanying the photograph, this system, which was used to handle hydrochloric acid, was…

Two views of a separator used to separate carbon tetrachloride and water containing hydrochloric acid at the Hercules Powder Company plant in Parlin, New Jersey. The employee visible in the first photograph is…

Close-up view of solid Penton needle and plug valves, as well as Penton pipes and fittings, at the Hercules Powder Company plant located in Parlin, New Jersey. Penton was a Hercules-branded chlorinated polyether used as…

Close-up view of assorted valves and pipes at the Hercules Powder Company plant located in Parlin, New Jersey. Per notations accompanying the photograph, these valves and pipes were lined with Penton, a Hercules-branded…

General view of an unidentified employee operating a polymerizer and extruder at the Hercules Powder Company plant located in Parlin, New Jersey. Per notations accompanying the photograph, the polymerizer and extruder…

General view of a Prodex brand extruder used in the production of Penton, a chlorinated polyether used as an ingredient in protective coatings for structural steel and other metals, papers, cardboard, and plastics, at…