The datasets behind the publications ... Kumar, R., Argyropoulos, A, Aubry, Y, Madsen, B., Michaud, V., Mikkelsen, L.P., Improving thin-ply composite performance: A study on pre-spreading and thermal treatment of glass fibres, submitted. Kumar, R., Mikkelsen, L.P., Aubry, Y, Data-in-brief paper The cases are denoted (see reference for details) R: as-Received fibers P: Production (Typical) PS: Pre-spread PST: Pre-spread and thermal treated File types: *.tif: SEM images for fiber volume fraction determination *hdr: Meta-data behind SEM-scan *.m: Matlab script for fiber volume fraction determination *.txm: X-ray scan of all three samples *CropX.ipynb: Notebook for fiber orientation determination for the CropX part of the x-ray scan *XXmm.xlsx : Single fiber test for xx mm gauge length *_Compliance.xlsx: Extracting the measurement compliance during the single fiber test. DataAnalysisFibers_R_PS_PST.ipynb: Jupyter Notebook for single fiber analysis