Jute

What is jute?

Jute is a long, coarse, glossy bast fiber from plants of the genus Corchorus, in the mallow family. The fiber is mostly cellulose and lignin and sits in the bark of the stem. In rope form, jute is the most-used material for Japanese ropework.

Where jute comes from

From the bark of an annual plant that grows in the monsoon. The fiber is freed by retting: bundles of stems go into slow-moving water, after which workers scrape off the non-fibrous material and pull the fibers out of the stem. In Bangladesh, jute is called the golden fiber, for its color and for what it earns. Tossa jute, per the same source, is softer and silkier than white jute, and stronger too.

Why jute is the standard rope for shibari

Grip. The description of Japanese bondage calls loosely laid three-strand jute the most-used rope in Japan. The coarse fiber lets a wrap hold without a knot, and with shibari that is exactly the point. That jute is also cheaper than good hemp rope and frays faster is what rope buyers say about it. It hasn’t been measured, and there’s no source for it that holds up.

What to watch for

• Don’t count on the material for your safety. Khodulev and colleagues show in Cureus that even six-millimeter jute can shut down the extension of wrist and fingers during a suspension; in nine out of ten rope injuries the damage was on the radial nerve.
• Buy by fiber type, not by product name. Jute is sold as hemp all the time. Ask for the plant.
• Store it dry and retire a strand the moment it starts to fray. Natural fiber is a consumable.
• Keep one bundle aside for whatever goes under load, and use the older strands for decorative work.

Where this fits on this site

I work with real hemp, but jute is what most people start with because it’s affordable. If you want to feel once what natural-fiber rope does without buying a closetful yourself, the page on the BDSM date explains how that goes.

Sources

• Jute. Wikipedia. Provides the description of jute as a long, coarse, glossy bast fiber spun into coarse, strong thread, the origin from the genus Corchorus in the mallow family with Corchorus olitorius and Corchorus capsularis as the two species, the composition of mostly cellulose and lignin, the extraction from the bark, the fiber length of one to four meters in off-white to brown, the nickname golden fiber in Bangladesh, the retting in slow-moving water followed by stripping, the note that tossa jute is softer, silkier, and stronger than white jute, and India and Bangladesh as the biggest producers.
• Japanese bondage. Wikipedia. Provides that the most-used rope in Japan is loosely laid three-strand jute, that it is called asanawa, and the sizes of around six millimeters and seven to eight meters per strand.
• Acute Radial Compressive Neuropathy: The Most Common Injury Induced by Japanese Rope Bondage. Khodulev, Klimko, Charnenka, Zharko & Khoduleva, Cureus 15(5), e39588, 2023. Provides the picture of acute compressive neuropathy after suspension on six-millimeter jute rope, with loss of extension in wrist and fingers, and the 90 percent share for the radial nerve.

Related terms

• Shibari. The practice jute is the standard rope for, with the history and the risk figures.
• Asanawa. The Japanese name for this rope, with the sizes that are common there.
• Hemp rope. The pricier natural fiber jute often passes for, and what it does to skin.
• Hempex. The synthetic alternative that takes the maintenance out, and the grip along with it.
• Friction. Why a coarse fiber lets a wrap hold without a knot.
• Bondage. The wider frame, with the rules of thumb that apply to every material.
• Rope. The made thing itself, and why its construction matters more than the fiber type.