Relief prints are made by applying ink to the raised part of a block and pressing the block against paper (or other material). In some ways this technique is opposite of intaglio prints. The advantage of relief printing is that the blocks are usually easy to make and do not require special equipment for making the block or running the prints. It is also fairly easy to create prints of more than one color through a process called registration. The blocks were traditionally made from wood. Today many schools use linoleum to make relief prints. The one disadvantage of this technique is that the block starts to wear quickly. If a lot of prints are made it is clear which ones were done at the beginning of the run and which ones were done later. Bear in mind that although the craftsmanship is mostly in creating the block, the resulting product is the surface upon which it is printed and not the block itself.