This is dye sublimation printing for color originals. It has been in use by Kodak for years and is implemented in their small home printing dock. Heat is used to transfer digital images or scanned images onto a sheet of special paper from a sheet of meltable dye. It makes 4 passes by the heating head printing a C/M/Y/K image.
OTOH, there are ways to reduce washing by chemical additives in the fix. These are expensive but useful.