CARTA TERMOSENSIBILE PER REGISTRAZIONI AVENTE MIGLIORATE QUALITA DI MANTENIMENTO DEL COLORE DI FONDO

摘要

A heat-sensitive recording paper in which a necessary heat-sensitive image-forming layer is provided on a neutral or alkaline paper prepared by practising the sizing process by the use of a combination of anionic sizing agent and cationic fixing agent, a combination of reactive sizing agent and neutral fixing agent or a self-fixable cationic sizing agent is improved in the keeping quality of ground color so that the ground is protected against coloration for a long period of time even at high temperature at high humidity or at high temperature, which enables to use 3-pyrrolidino-6-methyl-7-anilinofluoran or 3-N-methylcyclohexylamino-6-methyl-7-anilinofluoran as a color-forming agent in combination with Bisphenol A as an acidic color-developing agent.