  In recent measurements on the charge-density-wave (CDW) conductor blue bronze
(K0.3MoO3), the electro-transmittance and electro-reflectance spectra were
searched for intragap states that could be associated with solitons created by
injection of electrons into the CDW at the current contacts [Eur. Phys. J. B
16, 295 (2000); ibid 35, 233 (2003)]. In this work, we adapt the model of
soliton absorption in dimerized polyacetylene to the blue bronze results, to
obtain the (order of magnitude) estimate that current induced solitons occur on
less than ~ 10% of the conducting chains. We discuss the implications of these
results on models of soliton lifetimes and motion of CDW phase dislocations.
