Thermal transfer film and image forming method

An image forming method comprising the steps of superimposing a transfer receiving material onto the coloring layer surface of a thermal transfer film, heating and recording from the substrate film side like pixels by heating means, and separating the thermal transfer film and the transfer receiving material,

• wherein the thermal transfer film comprising a coloring layer formed on a substrate film via an intermediate layer, in which the intermediate layer contains a polycaprolactone resin having a 100 mPa·s or more and 1,000 mPa·s or less melt viscosity at 75° C., and a binder resin having a 130° C. or more and 400° C. or less extrapolation fuse starting temperature defined in the JIS K7121-1987 is used, and the time from recording the pixels to separating the thermal transfer film and the transfer receiving material is 0.05 second or more and 2 seconds or less.

A thermal transfer film comprising a coloring layer formed on a substrate film via an intermediate layer, wherein the intermediate layer contains a polycaprolactone resin having a 100 mPa·s or more and 1,000 mPa·s or less melt viscosity at 75° C., and a non-transferable binder resin having a 130° C. or more and 400° C. or less softening temperature measured by the ring and ball method defined in the JIS K2207-1980.

An image forming method comprising the steps of superimposing a transfer receiving material onto the coloring layer surface of a thermal transfer film, heating and recording from the substrate film side like pixels by heating means, and separating the thermal transfer film and the transfer receiving material,

• wherein thermal transfer film comprising a coloring layer formed on a substrate film via an intermediate layer, in which the intermediate layer contains a polycaprolactone resin having a 100 mPa·s or more and 1,000 mPa·s or less melt viscosity at 75° C., and a non-transferable binder resin having a 130° C. or more and 400° C. or less softening temperature measured by the ring and ball method defined in the JIS K2207-1980 is used, and the time from recording the pixels to separating the thermal transfer film and the transfer receiving material is 0.05 second or more and 2 seconds or less.