GarmentCare Guide 
Ideal Home describes an ironing trick in which a smooth sheet of aluminum foil is placed beneath the ironing board cover. The reflective surface is intended to return heat toward the underside of the garment. The important placement detail is that clothing remains on the normal cover, rather than being laid directly on the foil.
The article presents the method as a way to reduce repeated passes, not as a new fabric temperature allowance. A garment's care limits and the board manufacturer's instructions still matter. Understand the proposed arrangement before trying a household shortcut, especially when it changes how heat behaves beneath the pressing surface.
