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,
Sometimes I'm Happy (Sometimes I'm Blue) a duet by Baur and Gladys Rice on Columbia Records (catalog number 998-D) and a vocal by Vaughn De Leath on Brunswick Records (catalog number 3608) also had a significant degree of popularity. A number of other recordings were made in 1927 (see below), and the tune has become a standard, recorded by many artists since that time. It appeared as the B-side of the landmark 1935 recording of "King Porter Stomp" by Benny Goodman and his orchestra (released July 31 as Victor 25090). Sometimes I'm Happy (Sometimes I'm Blue) "Sometimes I'm Happy" is a popular song. The music was