Designer Denim | Custom Overalls
This is how I create denim looks for my customers. I prefer to apply the Heat Transfer images using a heat gun. The reason I prefer using a heat gun is that the heat is evenly distributed and I don't get discoloration or press marks from the pressure of the Iron.
However, If you don't have a heat gun, you can use an iron. Just be sure to practice and adjust your heat and the amount of pressure you apply to your liking before creating your project.