The co presence of a phenol derivative represented by chemical formula 1 and {TAIL ~ 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 {HEAD ~ a color developing agent} and a basic dye 
The co presence of a phenol derivative represented by chemical formula 1 and { TAIL ~ 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 { HEAD ~ a color developing agent } and a basic dye
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH