In the process of making wool felt, we often feel that our works are easy to fuzz, or as soft as dumplings, easy to deform, because felting is not enough. How to know whether our works have been completely felt can be judged by the following points:
1. Observing whether the surface is covered with pinholes, it is impossible to tear wool from the surface of fully felt objects.
2. The shape of the felt can be maintained by squeezing with the fingers without deformation.