Like the frame, the right mat can make the difference between a nicely framed image and one that has that "WOW" factor.
Dry mounting is a method of adhering an item onto a firm support surface by means of a heat-sernsitive adhesive. Mounting in this manner helps to flatten prints, photographs or posters that may have lines or wrinkles. It ensures that there will be no "slippage" after the item has been framed. It's particularly important to consider when dealing with over-size items.