Customizable Darkroom Print Mask

thingiverse

You can use this instead of an easel to make darkroom (wet) prints with a very defined margin. Both the bottom and top parts have round (neodymium) magnets so that the bottom part sticks to the enlarger base or easel (typically made of metal) and the top part sticks to the bottom part. You should glue the magnets taking care of inserting them first on the top part, then on the bottom part, holding both parts together (which will make them stick in the correct orientation). There's a finger gap to separate the parts and also to lift the print of the bottom part. You can customize the paper size and also the margin to leave in each direction.