Aluminium foil with all metallic items, aluminium foil reacts to being placed in a microwave oven. This is because of the electromagnetic fields of the microwaves inducing electric currents in the foil and high potentials at the sharp points of the foil sheet; if the potential is sufficiently high, it will cause electric arcing to areas with lower potential, even to the air surrounding the sheet. Modern microwave ovens have been designed to prevent damage to the cavity magnetron tube from microwave energy reflection, and aluminium packages designed for microwave heating are available. Heavier foils made of aluminium are used for art,
Foil stamping There are two primary types of foil stamping machines. The first type is manual and the second is pneumatic (air powered), which typically used in a commercial print shop. Manual foil stampers are ideal for low jobs and the pneumatic is ideal for medium to high-volume jobs. Commercial Foil Stamping is usually produced on a Kluge foil stamp press or a Heidelberg Windmill retro fitted for foil stamping. Foils come in a wide selection of colors and finishes, from the most commonly used metallic gold and silver to foils with pearlescent and holographic effects. Foil stamping Foil stamping, (also known