Separate each napkin, remove the two bottom layers and keep the top one only. Cut out enough shapes to create an all-over design on the plate. Please note that napkin paper is very fragile and therefore the smaller the shapes, the easier it is to glue them.
Turn the plate upside-down on your piece of parcel paper or card (any piece of plain paper will do) and draw the outline with a pencil.
Cut out the shape: you will use this as a template for your design.
Play around with the shapes on your paper template until you're happy with the design.
With the plate upside-down, start glueing the pieces of napkin paper from the centre.
Brush the glue on the plate first, then carefully tap the piece of paper in place and add another layer of glue on top.
Let the plate dry (you can use a hairdryer to accelerate the process if you prefer) until the glue no longer feels tacky.
Cover the back of the plate with acrylic paint: 2-3 coats should be sufficient. Once the paint is dry, finish with a coat of polyurethane varnish. Any unevenness along the edge can be tidied up with sandpaper.