Mexico was one of the first places where cotton cloth was used — dating back to 5,000 B.C. In contemporary manufacturing, China and India are some of the world’s largest cotton producers, accounting for approximately 32.6 percent of the market in 2011, according to the article “India, China Set for Cotton Wars on Stubborn Yields.” The cotton making process includes harvesting the fiber and spinning the yarn before the fabric is made.
Cotton is typically planted in the autumn and harvested in the late spring in climates where the summers are long, hot and arid. There are many varieties of cotton, but some of the most popular for manufacturing are the Gossypium arboreum L. and Gossypium barbadense L. The white fluffy balls, referred to as “bolls,” grow in clusters and encase the plant’s seeds. During harvesting, each boll is picked by stripper harvester and spindle pickers, which are mower-like vehicles that sever and gather the cotton.
After the cotton is harvested, the fibers are separated from dirt, debris and seeds in a process called ginning. There are two types of cotton gins commonly used for this process: roller and saw gin. The saw gin uses a circular blade to grab the cotton fibers and pull them through a mesh that is too small for debris to pass through. The roller gin uses a leather roller to pull the cotton through a blade that has narrow teeth for capturing the seeds and dirt. After ginning, the cotton fibers are compressed into bales.
When cotton bales arrive at the spinning plant they are opened and separated by quality. The wads of cotton are put through a carding machine, which straightens them, allowing the fibers to lie parallel to one another. Afterwards, they are combed and bleached with hypochlorite or peroxide before the fibers are spun. Spinning machines operate by first condensing fibers together, rolling them onto a bobbin in one long strand. Then the strands are twisted into yarn.
There are many ways to weave cotton yarns, but the two most common are the basic and twill weave. For basic weaving — which is a basket-like grid — rows of warp yarns are strung on the loom vertically, while a shuttle weaves the weft yarn through them horizontally. The twill weave is slightly more intricate, because it floats or passes the weft yarn over two or three warp yarns to create a diagonal pattern. Common basic weave fabrics include muslin and organdy, while popular cotton twills are denim and khaki.
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- “Inventing the Cotton Gin: Machine and Myth in Antebellum America”; Angela Lakwete; 2003
- “Cotton's Renaissance: A Study in Market Innovation”; Timothy C. Jacobson, George David Smith; 2001
B. Maté has been reporting on creative industries since 2007—covering everything from Fashion Week to the latest artist to wow the Parisian art scene. Her experience stems from a marketing background, with more than 12 years of experience consulting fashion-forward entrepreneurs.