Figure S2 from Body-monitoring with photonic textiles: a reflective heartbeat sensor based on polymer optical fibres QuandtBrit M. BraunFabian FerrarioDamien M. RossiRené Scheel-SailerAnke WolfMartin BonaGian-Luca HufenusRudolf SchererLukas J. BoeselLuciano F. 2017 Mechanical testing of fibre ID-1144 after drawing to 26 % (well within plastic deformation); the initial radius is reduced to 71.7 µm.