A pen drawing on paper which is created with an xy plotter. We use these paper patterns to accurately install letters by hand. We use these when we are installing dimensional letters and logos on interior walls. Below are a couple of interesting articles which explain the paper pattern installation process with some detailed photos to further demonstrate this installation technique. For interior installations the letters would be placed on the wall with double sided VHB tape as each paper letter is cut away to reveal the installation surface behind the paper. For exterior letters paper patterns contain marks where we drill our holes. Those marks correspond with the stainless steel pins which are in the backs of the letters. The pins are inserted into the wall with silicone to keep the letter in place during wind, rain and other foul weather conditions.