a Eng. Strain at break, b Eng. Strength, c Young’s modulus, and d toughness modulus of fibers that are as spun (dry) or have been supercontracted at 85% relative humidity while restrained in one end, then dried (at 35% relative humidity) and subsequently tested. Asterisks above the histograms indicate significant differences (p value <0.05). The color green is used for the NT2RepY-FCT and the color black for the NT2RepCT. The error bars are the standard deviation of the data set.