What you’ll need:
An iron, an ironing board, your patch, a thin piece of fabric like a pillowcase or some baking paper to protect your clothing and patch from the heat.
Some caveats with materials:
Before you get even get started, it’s good to know that iron-on patches don’t work super well on certain fabrics, like nylon, rayon, leather, or waterproof materials.
In that case, you might want to actually sew them on instead. They DO work great on cotton and polyester though. Just look at the labels of the items you want to customize beforehand.
Also if the garment is going to be washed regularly then we advise that you stitch the patch on as it will eventually come away from the fabric
How to apply an iron-on patch:
1. Heat up your iron. You want it to be on its highest heat setting in order for the patch to adhere properly to the item.
2. Peel the backing paper away from the back of the patch
3. Plan your design. Lay out your piece of clothing on the ironing board and place the patch in the spot where you want to stick it. The adhesive side (i.e., the side without the design) should be flat against the fabric. If you’re ironing it on shoes or a hat—or other things that don’t lie flat—stuff the insides with towels. This way, when you press on the patch with an iron later, it is as close to the fabric as possible and doesn’t shift around.
4. Place a thin cloth or baking paper over the front of the patch. This will act as a barrier between your patch and the iron to protect the fabric of your clothing from the heat.
5. Iron on that patch. Okay, it’s go time. Place the iron over the patch and cloth and hold it there for 30 seconds.
6. Let it cool, before touching as it may burn
Be aware !!! Iron-on backing is not super robust and will not withstand heavy or daily use