Composite material reinforcement materials. Another important factor is the gross quantity of material to be produced. Large quantities can be used to justify high capital expenditures for rapid and automated manufacturing technology. Small production quantities are accommodated with lower capital expenditures but higher labour and tooling costs at a correspondingly slower rate. Many commercially produced composites use a polymer matrix material often called a resin solution. There are many different polymers available depending upon the starting raw ingredients. There are several broad categories, each with numerous variations. The most common are known as polyester, vinyl ester, epoxy, phenolic, polyimide, polyamide, polypropylene, PEEK,
The City Of London Phonograph and Gramophone Society London throughout its history, with meetings presently held at Conway Hall. By the mid 1960s, the interest in radios as a hobby had waned, and the group renamed themselves with their present name to reflect their interest in early recorded sound technology. One of the Society's patrons is Oliver Berliner, grandson of the recording pioneer Emile Berliner. Since 1963, the society has published its magazine, initially named "The Hillandale News" and now called "For the Record". These publications have been a significant vehicle for research on early recordings. The City Of London Phonograph and Gramophone Society The City Of London