The face can be either printed 0.4mm high to glue it to the blank head model or it can be embossed into the original head then glued or you can also choose to do multi-color but I would not recommend it as it wastes a lot of material for the purge block. I had really good results printing it flat as a 0.4mm high shape and then using superglue to glue it on top of the blank head.
The author remixed this model.
A pirate face from the pirates of the caribbean series for the Brick Megafigure