Ca-Ch is for
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Carabiners
Commonly used in suspension (Tsuri) to help separate uplines, when using a single point like a ring where the lines may otherwise easily tangle together
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Carrick Bend
Otherwise known as the Somerville Bowline, our most widely used and reccomended single column tie. Forms the basis of most initial ties
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Calf knot
Another name for the granny knot, used as a single column knot in Shibari
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Caterpillar
Floor based tie in which the legs are bound together, and wrapped leaving the person resembling a catapillar, this is refered to as Imomushi Shibari 芋虫縛り
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C.B.T.
The initials C.B.T. stand for Cock and Ball Torture, within Shibari this typically involves tying male genitalier with a 2-4mm thick rope.
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Chest Harness
Chest harness are patterns which go around the chest; this can include ties where the rope goes over the arms, but is normally used for ties which only go around the chest
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Chimuo Nureki 濡木痴夢男
Chimuo Nureki (1930-2013) was a prolific (and award-winning) writer, playwright, editor, and influential bakushi who produced a number of videos and books on how to tie.
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Chokushin Ushirote Shibari 直進後手縛り
'tying hands straight behind the back' This is the Japanise name for the tie more commonly refered to by English speakers as the strapardo in which the arms are brought together behind the back and bound.