These rust-colored magazines are often mistakenly identified as being made of Bakelite (a phenolic resin), but were actually fabricated from a two-part glass-reinforced polyethylene plastic molding, assembled using an epoxy resin adhesive.
The nave windows and window above the organ gallery were replaced between 1965 and 1975 with faceted glass and epoxy designs created by the Willet Studios of Philadelphia, Pennsylvania.
FR-4 (aka FR4), is a widely accepted international grade designation for fiberglass reinforced epoxy laminates that are Flame Retardant (self extinguishing).
Electron Microscopy Technique: after embedding tissues in epoxy resin, a microtome equipped with a glass or gem grade diamond knife is used to cut very thin sections (typically 60 to 100 nanometer).
The shells were then assembled, at the Nevis Laboratories of Columbia University, using graphite spacers machined to constrain the glass to the conical shape, and held together by epoxy.
Epoxy and Cyanoacrylate are sometimes also used for neck joints, but generally such use is rare.
A second lasting contribution was the use of Epoxy putty, a two-part ribbon epoxy designed for automotive repair, which held detail better than traditional media.