1. A method for measuring a property of a fibre comprising the steps of: (a) providing a fibre; (b) wetting the fibre; (c) deforming the fibre in its wet state around an object by applying a pressing load at a controlled pressure; (d) acquiring an optical section image by a CLSM of the deformed fibre; (e) making a measurement on the image; and (f) calculating the property using the measurement wherein the optical section image is a transverse image and the property is flexibility.