A long enough strip piled up into a helical coiled structure by the same method for folding the other object in convolution, with some help of physical property of paper:
An isosceles triangle which consists of two edges of equal length from hexadecagram{16/3} and the bottom edge from hexadecagram {16/6} (see the drawing at right side of the above image) is the basic unit to pile up a helical structure over the hexadecagon that circumscribes two hexadecagrams {16/6} and {16/3}.
In geometric conceptual folding, a strip is folded into a hexadecagon on the two dimensional plane, not coiled into a three dimensional body; but actually (and fortunately?), folding is done in the
real space with
real materials. Physical property of paper, particularly its elasticity, permits to pile it up into a helical coil and produces its slightly twisted shape: its larger picture is
here.
The object made of pink translucent paper and the single layer of its strip under folding as a diagram in the above image, both were displayed at the Second International Meeting of Origami Science and Scientific Origami, held at Seian University of Art and Design, Otsu, Japan, November 29-December 2, 1994.
Another object in the same shape made of tracing paper has appeared in the article
"Beauty of Convolution" Azuma Hideaki's spirals on the quarterly magazine
ORU #6 (1994 Autumn).
Material: strips of translucent paper, with the use of adhesive tapes [to stick together short strips side by side into a long one enough to fold and pile up].
(As far as the paper in use to fold this pink object is concerned;
If there exists a strip of appropriate length, then the description becomes as follows:
Material: a 'long enough' strip of paper, without using adhesives.)
Date: in 1993-4 [the same but smaller one that was folded at December 4, 1993 is still preserved in his files of folding samples on convolution]
Photo date: March 21, 2005

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