Thermal transfer printing method and intermediate sheets therefor

摘要

The present invention is directed to a thermal transfer printing process comprising: heating a thermal ink film with a printing head to print dye transferring images onto an intermediate sheet which comprises a substrate and a printing layer thereon, heaping an image receive sheet on said printing layer, and transferring said printing layer onto the image receive sheet by pressure or heat; an improvement residing in that said printing layer is formed from polyvinyl acetal. The present invention also provides an intermediate sheet for the above thermal transfer printing process comprising a substrate and a printing layer on said substrate wherein said printing layer is formed from polyvinyl acetal.