Abstract
The change of crêped state 1_??_2* from the state 1 to 2, which is defined as the ratio between the representation of the state 2 and of the state 1, is denoted theoretically thus: 1_??_2*=(1.11_??_0.898)sin a1/sin a2 a: the inclination of helical erêped yarn. Taking the results of observations into account the above expression is si_??_plified as written below: 1_??_2*=sin a1/sin a2
