Paper embosser / stamp / punch for Adventure Race checkpoints

Printing instructions:

• Layer height: up to 0.24mm for fast prints
• I recommend PETG for longer lasting hinges, but I used PLA and it works fine.
• The stl files are upside down, print them laying flat so you don't need supports.
• If you want more strength in the hinge, change the ‘Top/bottom line directions’ (cura) to all be in line with the hinge. (eg. [0, 0, 0])

Post processing:

Using a hairdryer, hot water or a heat gun carefully heat up the hinge. As soon as the hinge starts to become malleable, quickly fold the punch in place and let it cool down. 

The design:

Originally created for a little Adventure Race (AR) my friend set up for his colleagues. The aim is to orienteer to the checkpoints (CP's) and find these ‘punches’ marked by a little flag. You punch the unique design in your ‘passport’ (a card to keep track of your aquired checkpoints).

In this case it's not a punch but an embosser.