HEAT-SENSITIVE MULTIPLE DUPLICATING SHEET

摘要

PROBLEM TO BE SOLVED: To provide a heat-sensitive multiple duplicating sheet of high record sensitivity and superior storage properties for the simultaneous heat sensitive recording of three sheets or more. SOLUTION: A heat-sensitive multiple duplicating sheet is constituted of the combination of a first recording sheet 4 having a heat-sensitive recording layer 2 containing a colorless or light color basic dye of electron donative properties and a developer of electron donative properties for coloring the dye by the thermal reaction formed on one face of a base sheet 1 and a heat melting layer 3 containing a heat melting substance and a storage property improver formed on the other face of the basic sheet 1, one second recording sheet 6 or more having a thermoplastic layer 5 or layers containing a colorless or light color basic dye of electron donative properties and a heat melting substance and positioned on the other face of a base sheet 1' having a heat-sensitive recording layer similar to the layer formed on the above base sheet, and a third recording sheet 9 having a recording layer 8 containing a developer of electron donative properties for coloring the basic dye on the heat melting layer of the second recording sheet and formed on one face of a basic sheet 7. The developer of electron donative properties for the recording layer is composed of salicylic acid derivative metal salt.