Dye Transfer Thermal Recording Process (IV)

— lnteraction Between Dye And Binder —

Abstract

The dye transfer ink sheets have been made of one of cyan dyes with the low melting point and poly(vinyl alcohol) (PVA) binder, and confirmed to be used for G2 facsimile machines. Although authors tested the ink sheets of both magenta and yellow dyes possessing as same melting points as cyan respectively, these sheets showed the very low dynamic sensitivities. We investigated the causes of their low sensitivities. We investigated the causes of their low sensitivities, and make it clear that they are due to the interaction between dye molecules and PVA binder. When poly(vinyl pirrolidon) (PVP), which does not interact with these dyes, was used as their binder and glycerin as its plasticizer, we can obtain the dye transfer sheet which can be used for G2 facsimile from the view of sensitivity.