Below is why the clothes ironing service believes in ironing clothes from the inside out.

Some fabrics can easily burn or become glossy when pressed. They become just as smooth if you iron them from the inside, but there is less risk that the fabric's look will change.

Original Source: https://www.quora.com/Why-do-some-people-iron-their-clothes-from-the-inside-out/answer/Hello-Laundry