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.

F. Weber & Company, Inc. is an American manufacturer and supplier of artists' materials. Ernest Gustav Weber (1888-1965) was owner Frederick Theodore Weber (1845-1919)'s son. After their father's death, Weber and his brother, Frederick William Weber (1890-1972), were business partners running the supply store. This item is Ernest Gustav Weber's journal. The journal contains income and expenses from 1905 and 1906. There are also some lists of correspondence, addresses, and travel information.