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Top: modulus (MPa) and strain at break (%) for PCL. Middle: modulus (MPa) and strain at break of PLA-printed parts. (a–f) Illustrative pictures of the horizontally printed specimens with a number of external PLA layers gradually substituted by PCL. Bottom left: modulus (MPa) of the specimens versus de number of PCL shells. Bottom right: strain at break (%). Layer height: 200 μm.
