The fraction of wool fibres resistant to peracetic acid and ammonium hydroxide treatment has been investigated with the electron microscope. The insoluble residues consist of (i) a cuticle sheath, which encloses (ii) fibrous material from the cortex.
No takes yet. Share an insight, caveat, or question.
Manogue et al. (1953) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: