What characteristic is evaluated when assessing sheep wool's quality?

When assessing the quality of sheep wool, crimp is a key characteristic evaluated. Crimp refers to the natural wave or wave-like structure in the wool fibers. It is important because crimp contributes to the elasticity and bulk of the wool, impacting its feel and insulation properties. Wool with good crimp will have better recovery and loft, which are desirable traits for various woolen products. The presence of crimp can also affect how well the wool can hold dye and process into yarn, making it a critical factor in wool quality assessment.

While density, length, and color are also aspects of wool evaluation, they do not have the same level of significance regarding the structural integrity and performance of the fiber as crimp does. For example, length and color may influence aesthetic preferences or processing capabilities, while density relates more to the weight and warmth of the wool. However, crimp fundamentally affects how the wool behaves and performs in its various applications.