How to Make Cards From Paper Napkins
Take a piece of cardstock and cut it to the size that you will need, based on the size of your paper napkin. Set it aside.
Open the paper napkin completely and cut off one of the fourths of the napkin to be used for the card.
Remove each layer of paper from the front image of the napkin by carefully pulling off all the layers until you only have the main image; cut it larger than the cardstock so that there is an inch excess on each side of the cardstock.
Place a few sheets of scrap paper on the ironing board and place the cardstock on the top of the pile.
Cut a piece of plastic wrap to be one inch larger than the cardstock on each side. Place it over the cardstock.
Place the paper napkin image face up on top of the plastic wrap and top the pile off with another set of sheets of scrap paper.
Turn the iron on and set it on medium. With a little pressure, iron over the scrap paper and the layers of napkin, plastic wrap, and cardstock for 10 to 15 seconds.
Check to see that the napkin has fully fused to the cardstock. If it hasn't, repeat Step 7 until the napkin is completely fused.
Cut off the excess plastic wrap and napkin after you've let the cardstock to cool for a few seconds.
Tape or glue the cardstock to a blank greeting card as you wish and let it dry before you write anything in it.