Many spirals folded on graph paper. The straight lines make folding easier and the paper is inexpensive as a test surface.
Notes on variations of the trapezoid spiral.
Good quality, thin Japanese paper ~ 24 x 36 inches being forded.
The paper was so large and thin that I had to fold differently than for the small 8 x 12 samples.
The finished spiral. I invented the turn in that gives it a leaf shape at the top of the picture. It was a happy accident. The finished spiral is 11 x 12 inches.