The Castolite Company was a retail wholesaler of a clear, liquid plastic (or polyester resin) called "Castolite," which was used for casting, embedding, laminating, molding, or coating. The company was founded in 1948 by William Weers (1906-1976). Initially, the scientific community used Castolite for embedding biological specimens into clear, liquid plastic, among other scientific applications. The process became popular in the arts and crafts community, and hobby shops frequently sold Castolite. This small collection includes 1952 promotional sales materials for Castolite and its uses for making jewelry and other homemade creations; the purchaser could then sell their products for personal profit.

Chemists at DuPont’s Parlin, New Jersey laboratory produced a pyroxylin lacquer in 1920 called Viscolac and improved upon it in the following years and renamed it Duco. In the late 1920s Dulux was developed, which was an alkyd finish and had a higher gloss finish; a matte version of Dulux was also developed. This collection is a packet of advertising and sales aids for dealers of DuPont Duco and Dulux paints and finishes.

E.I. du Pont de Nemours & Company, Polymer Products Department researched, developed, and manufactured products made out of elastomers, plastics, and resins. The collection includes records from the Marketing Services Division, Experimental Station, Plastics Department's Polymer Products Division, Fabrics and Finishes Department, and Specialty Polymers Division. The records reflect the diverse functions for which the department and its predecessor components were responsible and contain material representing several periods in the department's history.

Joseph N. Borglin (1899-1976) was a chemical engineer in the Agricultural Chemicals Division at Hercules Powder Company. The records include typescripts for two works by Borglin: "Treatise on Vinsol Resin" and "Treatise on Rosin" both from the 1940s.

Polyacryl Iran Corporation (PIC) manufactured polyester and acrylic synthetic textiles in Iran. It was incorporated in August 1974 as a joint venture between E.I. du Pont de Nemours & Company, one of the largest U.S. chemical firms, and the Behshahr Industrial Development Corporation, a conglomerate run by the influential Lajevardian family. Because of political unrest within the country, DuPont shut the plant down in early 1979 with the hope of resuming operations at a later date. When Iran's textile industry was nationalized under Ayatollah Ruhollah Khomeini following the Islamic Revolution, DuPont initiated legal action for claims against PIC and the Iranian government. An international court reviewed DuPont's claims and directed the Islamic Republic of Iran to reimburse DuPont for $42 million. The American records of the Polyacryl Iran Corporation document DuPont's role in the transfer of American technology to Iran, the fate of Western interests during the Iranian Revolution, and the subsequent expropriation and pursuit of damage claims. Because of the litigation surrounding the termination of DuPont's participation in the project, the records contain extensive plant design and managerial training documents that give a detailed picture of a state-of-the-art synthetic textile factory of the late 1970s.