The article discusses how to accurately measure the bending stiffness of continuous fibre reinforcements, which is important for predicting their shape during forming. The researchers developed a bending test using a cantilever approach and a CCD camera to measure the bending deflection shape. They used a quartic B-spline curve to calculate the curvature of the deflection curve. The tests showed that the bending stiffness is not directly related to the material's tensile modulus. The proposed method successfully identified the non-linear bending behavior of different types of reinforcements.