Cardboard Ball Chair

Step 7 Finish half-sphere

When the half-sphere is nearing completion the inner cutter arm becomes more difficult to use due to the constricted space and the shallow cutting angles. The rising body essentially swallows the cutter arm. At this point switching to thinner cardboard such as 1/8 or 1/4 inch will build the height more slowly, but will give smoother cuts without switching to longer blades.

At a point approximately 5 inches from the top the inside cuts will no longer be possible. At this point remove the short clamping section from the inner cutter arm and allow it to fall inside the form. For the remaining layers I used single pieces of good quality, straight 1/4 inch cardboard with the shrinking inner circle approximated. Cut out that piece and center the hole when gluing.

When the top is reached, you're done with the first big portion. This is a good time to have a beer if you haven't already. It's a major milestone, but approximately the halfway point. Mix up some wheat paste and use newspaper to paper-mache a layer or two to cover the cut edges of the layers.

After the paper layers dry completely use a thin metal tool such as a wide chisel or pry bar to work the cardboard half-sphere off the turntable. The staples used to hold the first layer down will tear out of the cardboard, but cause little damage. The torn areas will eventually be covered anyway.

Comments

[primo16]

Cerveza Pacifico!