On Sep 2, 2015, "Jorge E. Jaramillo" <[email protected]> wrote:
I'd like to propose a definition for "dry tension" and would like to
hear people's opinion on it:
"Dry tension is the method by which the paper is "forced" to take a
3D shape
by the use of creases only and without the use of foil, wet folding or
other such methods. It is usually achieved by having one layer of paper
over another one, each one of them with a different area".
Dear Jorge,
I've never liked the conjunction of words "dry tension" and am
holding out for its complete abandonment. So don't expect help from
me there.
Lots of moves in origami, e.g. a petal-fold, sink etc. involve the
paper being pulled, if that's what you mean by tension (yet the
results are not what you are thinking of); and after the pulling the
shape is quite happy to stay as it is, so it is no longer in
"tension". The "tension" part of this term thus seems to me
completely misleading. And the "dry" is not much better. The normal
state of affairs is folding with dry paper. Nor is there any "wet
tension". Nor is wet-folding and letting paper dry the only way of
fixing a shape in its 3D state--you could start with foil-paper, end
with glazes, and so forth. So even using "wet" as the imagined
contrast is a bad choice.
As to the phenomenon you ARE describing, it seems to me that any
angled crimp, that is pair of MV folds (straight, curved or
combined), that ends in a point in the interior of a flat sheet--not
its edge--will necessarily decrease the angle there from 360 to
something less, by up to whatever the angle is at the point of the
crimp. So you will necessarily get a cone-like shape there, which
will be three-dimensional, unless and until it is flattened. End of
story.
You can quote me on that.
Saadya
