Make Cordage (Plant Fibers)

Summary

Cordage (string/rope) is a force-multiplier: it enables binding, carrying, traps, fishing lines, bows, shelters, and many other tools. You can make usable cordage at Level 0 by processing natural fibers and twisting them into a 2‑ply reverse-wrap.

Terms used in this article

• Bast — the fibrous inner bark layer of some trees and shrubs, between the rough outer bark and the wood; it peels off in long tough strips.
• Pith — the soft, spongy core inside many plant stems; too weak for cordage, so it is removed.
• Ply — one twisted strand; a 2‑ply cord is two strands wrapped around each other.
• Splice — joining new fibers into a strand by overlapping and twisting them together (step 4 below).
• Braid — interweaving three or more strands by passing the outer strands alternately over the middle, like braiding hair.

Prerequisites

• None (Level 0).

Diagram

Materials

• Fiber source: long, tough plant fibers. Options include:
  • Inner bark (bast) from some trees/shrubs
  • Fibrous stems (nettles, dogbane, milkweed relatives)
  • Long grasses or reeds (usually weaker, but usable)
• Clean water (optional but helpful for soaking/softening fibers)

You do not need a cutting tool if you can tear/split fibers by hand, but a sharp stone edge makes it easier.

Steps

1) Harvest and sort fibers

1. Collect a bundle of long fibers (longer is easier to twist).
2. Remove leaves, pith, and brittle outer layers.
3. Sort: keep the longest fibers for the main line, shorter fibers for splicing.

Goal: fibers that bend without snapping when you pull them gently.

2) Dry or dampen (depending on the fiber)

• Some fibers twist best slightly damp (less brittle).
• Some bark fibers need soaking to separate and soften.

If fibers snap while twisting, dampen them. If they stretch and get mushy, dry them a bit.

3) Make a 2‑ply reverse-wrap

This is the core technique: twist each strand in one direction, then wrap the two strands around each other in the opposite direction. The opposing twists lock.

1. Split your fiber bundle into two equal strands.
2. Twist the right strand away from you until it wants to kink.
3. Hold that twist, then wrap the right strand over the left strand (toward you).
4. Repeat: twist the new right strand away from you, then wrap it over.

Keep steady tension so the cord stays even.

4) Splice in new fiber (to make a long line)

1. Before a strand runs out, lay a new bundle of fibers overlapping the thinning strand by a palm-width or more.
2. Twist the old + new fibers together as if they were one strand.
3. Continue reverse-wrapping.

Stagger splices so both strands do not get thick at the same spot.

5) Finish and test

1. When you reach the desired length, tie a simple overhand knot to prevent untwisting (how to tie one: Tie Basic Knots; a knot is just the cord crossed into a loop with the end passed through and pulled tight).
2. Pull hard along the length to set the twist.
3. If it loosens, add more twist and keep tighter tension while wrapping.

Water exposure

• Most plant cordage loses strength when soaked — grass cords most, bast cords least. Plan for it on fishing lines and anything left out in rain.
• Wet cordage stretches: a tie that was tight will sag. Re-snug knots and lashings after their first soaking.
• Dry wet cordage slowly under light tension (hang it with a small stone on the end). Drying fast beside a fire makes it brittle.
• Inspect water-worked lines before each use; retire a line at the first broken ply.

Verification

• Evenness: the cord thickness is fairly consistent.
• Twist lock: if you relax tension briefly, it does not immediately unravel.
• Line standard (fishing line, light ties): a sample holds your hardest steady two-handed pull without creaking, visibly thinning, or breaking.
• Rope standard (weight-bearing): a sample holds your full body weight, applied gradually and then with a small bounce. Test over soft ground, and never wrap cord around fingers.

Safety

• Cordage under tension can cut skin. Do not wrap it tightly around fingers.
• Some plants irritate skin. If you get stinging/burning, switch fiber sources or use a barrier (bark wrap, cloth).

Troubleshooting

• Cord unravels: you are not reverse-wrapping consistently; twist each strand until it wants to kink, then wrap.
• Cord breaks at splices: overlap is too short or fibers are too dry; increase overlap and dampen slightly.
• Cord is lumpy: splices are stacked; stagger them and keep strand sizes even.

Variants

• 3‑ply rope: make three cords and braid them, or reverse-wrap three strands (harder but stronger).
• Flat braid: good for straps; weaker as a round line.