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 The City Of London Phonograph and Gramophone Society The City Of London Phonograph and Gramophone Society (CLPGS) is an English society and registered charity dedicated to the research in all aspects of early recorded sound. Founded in 1919, the CLPGS is most likely the oldest society of its type in the world. The CLPGS was founded under the name "The Edison Society" in 1919, when Norman Hillyer and some members of the North London Phonograph and Gramophone Society decided that a group was needed within the City of London. The founding members agreed to approach Thomas Edison to ask if