Many people use Mylar balloons to celebrate special occasions such as birthdays and Valentine's Day. Instead of buying expensive, mass-produced balloons at a grocery store or card shop, make your own personalised balloon designs at home. Go to a craft store or party supply store to pick up blank Mylar balloons, and buy waterslide decal sheets either on the internet or at speciality craft stores.
Open the image or text file on your computer that you want to print onto a Mylar balloon. Make sure the image or text is the size you want it to appear on the balloon.
Insert a single sheet of waterslide decal paper into your printer and click "Print" on your file.
Remove the waterslide decal sheet from the printer and trim away the extra paper.
Spray the decal with three coats of clear acrylic spray and allow it to dry.
Immerse the waterslide decal sheet in a pan of water for about one minute, then press the backing of the decal against the balloon.
Slide the backing away so the clear film adheres to the balloon. Rub a clean cloth against the decal to soak up the extra water.
Allow the balloon and decal to dry for several hours in a location without direct sunlight.