Is it necessary to heat set my fabric painting project when using FolkArt® Fabric™ Brush-on Paints?

Heat setting is recommended for best durability. Allow the painted design to dry overnight. Place the item in a clothes dryer for 30 minutes on the highest setting allowed for the type of fabric used, OR you may heat set the painted piece using a dry iron and a pressing cloth by laying the pressing cloth over the painted fabric and iron the painted design for 10 seconds, lift the iron and move it to another section of the painted design. Your iron should be set at the highest setting allowed for the fabric used. NOTE: When using the FolkArt® Fabric™ Dimensional paint, you will not be able to heat set by iron, air dry your project for 72 hours and turn your garment inside out and heat set in the dryer for 30 minutes. Dryer is only used for heat setting fabric.