In the wool textile industry, several processes serve to improve the commercial properties of the fibres such as fineness,
softness, length, strength and lustrous. For example, wool is chemically treated with reductive agents then stretched and
set. This leads to modifications of the original protein structure causing changes in thermal behaviour, dyeing, colouristic
and wet resistance properties. A multidisciplinary approach was used to investigate treated and untreated wools, with the
aim of exploiting the nature of the structural changes. SEM and TEM revealed changes on the cuticle and cortical cell morphology;
structure modification were studied by FT-IR and DSC.