If you have napkins that are very simple and you want to give them a new look then bleach printing technique would be something worth a try. To make this flower like print you will require bleach, rubber tip pencil, toothpicks and napkins preferably in dark color. First take out a small amount of bleach in a container and sharp the eraser of the pencil a bit with a sharpener. Then dip the eraser in the bleach and stamp it onto the fabric to form a circle. To make the lines you have to dip toothpicks in bleach and draw with them. For your ease start by making one circle and then taking out lines from it like fireworks and at the end of each line make clusters of circles.