Code 3336 applies to employers engaged in operating a type foundry where type founders design and produce metal type for hand composition. Raw materials such as pig lead or brass is received from others which is melted and poured into small pigs to be used in casting machines. The molten metal is forced into the type die, solidified by a water cooling system around the die and automatically trimmed and ejected from the machine. This classification contemplates the machining and engraving of the dies utilized in the casting operations as well as sorting, inspecting and packaging the type.

This classification also applies to manufacturing white metal jewelry castings or other ornaments, either by hand pouring molten metal into molds or by using centrifugal casting machines. After casting, the pieces are trimmed to remove rough edges (known as gates or sprues) and tumbled in sawdust or buckshot for cleaning. There is no “finishing” of jewelry castings by soldering pins, clasps or earring backs in place or by hand tooling or drilling. However, other types of castings are sometimes plated or lacquered.

This classification also applies to manufacturing metal castings by the “lost wax” process. The process typically begins by pouring liquid wax into molds, cooling it and removing the resultant wax cast from the original mold. The wax cast is then dipped into and coated with a material such as silicone silicate. After drying, the coated wax article is placed into an oven, causing the wax to melt and run out. Molten metal is then poured into the remaining mold to form the metal casting, which is machined as necessary.