Why does wool felt?
As the wool fibers are moved while being felted, the fibers twist into each other and become entangled together, which helps keep a tight and firm lock without loosening. The scales on the outside surface not only serve as a prevention for slipping, but they also serve as extra fiber protection, acting like roof shingles, which allows the fibers to smoothly slide into the direction of the hair root.
What are the three main conditions for felting?
Wool is able to felt due to the microscopic scales on the surface of each wool fiber. When wool fibers are exposed to moisture, heat, and agitation, the scales lock tightly together.
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