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Fig. 3. Silking force and tensile properties of fibres retrieved from a forced
silking process characterized by high and constant silking force. (A) Silking
force vs position along the silk fibre obtained from a silking
process at 10 mm s–1 reeling speed. The numbered intervals
identify the samples shown in B and C. (B) Force–displacement curves of
the silk samples obtained in the forced silking process shown in A. Base
length=20 mm. For A and B, nominal reeling/test conditions were
T=20°C, relative humidity=40%. (C) Stress–strain curves
obtained by re-scaling the force–displacement curves in B using the
individual cross-section of each sample. In B and C, samples are identified by
a number, indicating the reeling interval in which they were spun, as labelled
in A. NS, naturally spun fibres; FS, forcibly silked fibres; MS, maximum
supercontracted fibres.
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