Here is how I transform this headband into an arc shape. Please follow the steps below.
This is what it will look like when the printing is complete.4oPlease push inward to shape it like this. It's normal to feel some resistance — press carefully to avoid breaking the hinge.After pressing inward, gently extend it outward to help the hinge move smoothly.Place it in hot water and let it soak for about 20–30 seconds.After soaking in hot water, it will become soft. Please press it into this shape.After pressing it into shape, let it cool for a while or rinse it with cold water to help it set.Once it has set, gently open the headband to form its final shape.This is what it will look like once it's finished.