A set of corners for creating a curved backdrop.
Perfect for your 3D-printing photoshooting.
The set is scalable depending of what cardboard dimension you chose, and what radius of the corner.
just choose a dimension for the radius and a dimension for the cardboard thickness. 2 pieces of cardboard are placed on the straight slots on the back, and serve as a rigid structure.
Then a thin cardstock is slided in the curved slot and locked to the cardboard using some paperclips.