ABSTRACT

Cotton samples representing a range of whiteness and trash content, as well as naturally colored cotton samples, were used in evaluating factors that could possibly limit precision and/or accuracy of cotton fiber color measurements taken using color spectrophotometers. In measurements with two instruments, variation in CIELAB data was associated with the size of the instrument aperture used in the measurement. Also, using a fiber cell with sample pressure ranging from 10 to 42 psi, sample lightness, redness-greenness, and yellowness changed with pressure. In each case, the relationship between the color reading and pressure was nonlinear.