Cross directions 1 Deformation 1 Deformation mechanism 1 Fibers 1 Fibre orientation 1 Field evolution 1 Imaging systems 1 Machine directions 1 Microscale deformation 1 Paperboards 1 Strain field evolution Strain fields 1 Synchrotron X-ray tomography 1 Synchrotron tomography 1 Tensile stress 1 Tomography 1 anisotropy 1 fibre orientations 1 paperboard 1 strain field evolution 1 synchrotron tomography 1