Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Proceedings
Publication Acceptance Date: 1/8/2002
Publication Date: 7/1/2002
Citation: Proceedings 2002 Beltwide Cotton Conferences, National Cotton Council, Memphis, TN, 3 pages
Interpretive Summary: Many events impact cotton fibers, with the most highly valued cotton white and homogenous in color. Cotton is a natural fiber influenced by growing conditions, microorganisms, weathering, trash, dust, oil, and other extraneous materials. It remains difficult to measure and understand all the aspects of color and trash. Cotton fiber color values are understood to change and age over the years. With increased processing speeds, cotto fiber classification improvements are required. This study will evaluate how cotton color measurements compare after 11 years and how current HVI values compare to other new techniques.
Technical Abstract: Samples from a 1990 USDA AMS study were used. A total of 78 cotton samples representing different US gins and different production areas, grown in 1989 and originally analyzed in 1990, were evaluated. HVI data from the original 1990 study were compared with HVI measurements taken on the same samples in 2001, and with spectrophotometric color measurements including CIELAB and Hunter L*, a*, and b* measurements, different standard illuminates and observer functions. The spectrophotometric measurements were also taken in 2001. Simple statistics were used to evaluate changes in samples between 1990 and 2001, as determined by two sets of HVI measurements, and to compare 2001 HVI and color spectrophotometric measurement methods.