The Bilateral Structure and the Swelling of Mild Pretreated Wools (Disulfide Exchange)

ence one can see best the transition of the anisotropic state to the isotropic state by observation through gypsum red I. We can show this on unpretreatt’d w<x)l; e.g., by its embedding in urea-bisulfite reagent (pl-i 7) [4] or in 0.1 N 1’a(~H at various temperatures and times. For example, the hilateral structure appears after 2-4 min. embedding in ureahisulfite at 65° C., owing to the decreasing hirefringence of the orthocortex ; after 4-8 min. the bire-