Cut your fabric to size 18 sq.
Iron vinyl fabric fold.
Make sure to keep the heat some distance from the banner or tablecloth.
I made mine a wee bit too small.
Creative possibilities are endless with heat transfer vinyl.
Sewing vinyl like sewing with other fabrics can require seams to be pressed in a certain direction.
The first thing to note is that you need to make sure neither the hair dryer nor the iron comes into direct contact with the vinyl material.
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Fold the edges to the inside and carefully use the tip of your iron to fuse the vinyl to itself.
It is always important to let the iron heat up before pressing this way you will know from the start whether the iron is too hot and can avoid surprises like the iron heating up halfway through pressing and melting the fabric.
Repeat on all four corners.
Make sure to keep the edge of the iron on the folded edge of the fabric and not on the vinyl itself.
Then using the end of a small screwdriver gently score a line on the fabric all along the intended crease.