Cotton and other naturally occurring fibers react first and foremost from mechanical deformation where you must physically “break the back” or defeat the physical memory of the fiber. Whether still in the as grown fiber/staple form or after a pulping process where you might convert the cotton staple into a pulp type web the ability of the cotton to form a web is totally dependent on the inter-fiber cohesiveness of the cotton itself to hold itself together. For this reason, most Calendering processes utilize high pressures in the presence of some heat in order to achieve the various Calendering objectives.