20 years of an eagle's flight
In principle, sprang may be regarded as a practical application of the
fiber manipulation techniques used in the children's game known as
cat's cradle.
[1]
Sprang is made by preparing a set of warp threads either on a
rectangular frame or between a pair of beams. The craftsperson then
generates a fabric by interlinking the warp threads. Unlike most
textile production techniques that add new rows at the end of completed
rows, sprang works upon the center of a group of fibers and the material
grows inward from both ends with symmetrical top and bottom halves.
The craftsperson must maintain control of the center area or the
structure unravels: most sprang worked upon has too many fibers to keep
in hand, so rods or sticks maintain the appropriate fiber positions.
The fiber manipulation itself is done by the craftsperson's fingers.
Decorative patterns may be generated by regular variations in the fiber
crossings. As crossings accumulate the craftsperson beats the material
flat with a stick.
[2][3]
Work continues with the material growing from both edges toward the
middle until the center band becomes too tight to continue work.
[4]
The completed fabric is either separated into two identical items or
permanently secured at the middle to stabilize the contrary twists.
[3]
In traditions where two halves of sprang are not severed by cutting,
this center seam is a telltale sign of sprang manufacture.
[3]
https://regia.org/research/life/sprang.htm
http://www.weavershand.com/
http://www.stringpage.com/sprang/sprang1.html
https://earthguild.com/products/riff/rcdweave.htm
http://www.shelaghlewins.com/tablet_weaving/TW01/TW01.htm
tablet weaving
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