{HEAD ~ The heat} is transferred through the thin substrate to {TAIL ~ the liquid crystal layer} which results in a color change in the liquid crystal 
{ HEAD ~ The heat } is transferred through the thin substrate to { TAIL ~ the liquid crystal layer } which results in a color change in the liquid crystal
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH