The first step involves applying {HEAD ~ a coating} containing the photosensitizer and polysiloxane polymers to {TAIL ~ the support} which is a solid substrate 
to
The first step involves applying { HEAD ~ a coating } containing the photosensitizer and polysiloxane polymers to { TAIL ~ the support } which is a solid substrate
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH