Drymounting is the total adhesion of an article to a board rendering it completely flat and ripple-free. The mounting process can actually include a variety of methods: Dry, wet, spray, or pressure sensitive. While drymounting is the preferred method for ease and durability, it is achieved with adhesive tissue, heat, and pressure. Not all items can tolerate heat and alternative methods are then required. Drymounting is considered permanent, although an acid free removable tissue can be used on an acid free board creating a better archival environment. Because total restriction is the end result, it is NOT considered a conservation method.