Clamshell box aid
This sample might help you as you cut your turn ins for the open tray section of the clamshell box. The shaded or crosshatched areas can be cut and removed. Pay careful attention to the mitered cuts and to the thickness of the board.
This cutting pattern can be used for the turn in of the single wall that is opposite to the tray’s open side. Pay careful attention to the mitered cut that is equal in length to the thickness of one board.
You have many options on your preference to cut the miters for your tray covering. These are slightly different to the methods that I show in my video “How to Make a Clamshell Portfolio.”
