Slipping layer for dye-donor element used in thermal dye transfer

A process of forming a dye transfer image comprising:

• (a) imagewise-heating a dye-donor element comprising a support having on one side thereof a dye layer and on the other side a slipping layer comprising a lubricating material, and
• (b) transferring a dye image to a dye-receiving element to form said dye transfer image, wherein said slipping layer comprises a polyvinyl-block-siloxane copolymer, the polysiloxane component comprising from about 2 to about 30 weight % of said copolymer, and the polysiloxane component having a molecular weight of at least about 3900.

A thermal dye transfer assemblage comprising

• (a) a dye-donor element comprising a support having on one side thereof a dye layer and on the other side a slipping layer comprising lubricating material, and
• (b) a dye receiving element comprising a support having thereon a dye image-receiving layer, said dye-receiving element being in a superposed relationship with said dye-donor element so that said dye layer is in contact with said dye image-receiving layer, the improvement wherein said lubricating material comprises a polyvinyl-block-siloxane copolymer, the polysiloxane component comprising from about 2 to about 30 weight % of said copolymer, and the polysiloxane component having a molecular weight of at least about 3900.