Duplexing actually isn’t a finishing process, it’s more of a “beginning” process, where two sheets of paper are glued together. We usually print papers before we duplex them, to ensure the best impression for your pape. It’s quite common to duplex different paper colors together to maximize a particular color palette. Differing weights of paper and papers with different textures can be duplexed, too. Duplexing adds to the overall cost of a project so be sure to inquire about duplexing at the beginning of your project.