Remove the backing layers of the paper napkin motif.
Place the napkin motif on a paper (the top printed layer against the paper).
Spray it with a little spray varnish-glue (about 20 cm). Wait a few minutes.
Place the motif on the wooden plaque,
Start from the center and work your way out to the outer edges.
Be careful to put it on the right place, exactly on the modelling clay places. Else, with this kind of glue, you can try again because the napkin will not be ripped.
Add a coat varnish for extra protection.