{HEAD ~ The co presence} of {TAIL ~ a phenol derivative} represented by chemical formula 1 and a diphenyl sulfone derivative represented by chemical formula 2 in the thermosensitive color developing layer is presumed to support the well balanced performance by increasing the stability of the electron transfer complex that is the reaction product of a color developing agent and a basic dye 
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{ HEAD ~ The co presence } of { TAIL ~ a phenol derivative } represented by chemical formula 1 and a diphenyl sulfone derivative represented by chemical formula 2 in the thermosensitive color developing layer is presumed to support the well balanced performance by increasing the stability of the electron transfer complex that is the reaction product of a color developing agent and a basic dye
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH