The firing shrinkage of a clay is usually about the same as the drying shrinkage. Total shrinkage will usually be about 8-12%. The next stage that happens during the firing process is vitrification. This is the hardening, tightening and finally the partial glassification of the clay. Vitrification results from fusions or melting of the various components of the clay.
Middlesboro (local /ËmÉªdÉlzbÉrÉ/) is a home rule-class city in Bell County, Kentucky, United States. The population was 10,334 at the 2010 U.S. census, while its micropolitan area had a population of 69,060. It is located 1 mile west of the Cumberland Gap and is the largest city in southeastern Kentucky. It is located entirely between Pine Mountain and the Cumberland Mountains in the Middlesboro Basin, which geologists believe to be an enormous meteor crater (one of three known astroblemes in the state).
Murfreesboro is a city in and the county seat of Rutherford County, Tennessee. The population was 108,755 according to the 2010 census, up from 68,816 residents certified in 2000. In 2014, census estimates showed a population of 120,954. The city is the center of population of Tennessee and is part of the Nashville metropolitan area, which includes thirteen counties and a population of 1,757,912 (2013). It is Tennessee's fastest growing major city and one of the fastest growing cities in the country.