Disclosed is a process for the detection of marked components of a composite
article. The present invention relates to detecting the presence, position, concentration
and/or distribution of one or more components in a composite article, and to registration
inspection of a composite article using infrared radiation. In one embodiment of
the invention, infrared blockers, such as absorbing infrared blockers, are incorporated
into the component of interest in the composite to increase the visibility of the
marked component during inspection.
