A Valentine's Day card is even more special when it's handmade, and there are a number of techniques you can employ to create your own cards at home. One especially distinctive method is block printing. Dating back to ninth-century China, block printing involves transferring an ink impression of a design carved in wood, linoleum, or other engravable medium to another surface. Once a design is chosen and then carved, it can be used to make an unlimited number of prints. If you're creating multiple cards, reapply ink to the block after each print, and wash the block with warm water, drying it with a lint-free cloth after every three prints.