Past research has indicated that a nondestructive VIS/NIR diode-array HVI measures the fundamental fiber properties of wall thickness and perimeter on blended cottons with precision equal to the primary methods used to calibrate the diode-array HVI. In this study, an improved Micromat model of the FMT is used as the reference to calibrate two diode-array HVIs for use on unblended, raw cottons and blended cottons.