What Is Duplex Printing? Marketing Team Updated June 18, 2023 14:00 Follow Duplex = Double Sided Duplex printing is when you print on both sides of the paper as opposed to simplex printing which is single sided. Menus are often printed in duplex printing. Related articles What Is Simplex Printing? What Is Image Resolution? Accepted File Formats Beginners Guide to Business Cards Comments 0 comments Article is closed for comments.