How to Tie a Blood Knot Step by Step

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Written Instructions — Blood Knot

Overlap lines Hold both lines parallel with 6 inches of overlap, both tag ends pointing the same direction.
Wrap Line A five times Take Line A's tag end and make 5 wraps around Line B toward the center, then thread back through the center gap.
Wrap Line B five times Mirror Line A: wrap Line B 5 times around Line A in the opposite direction, threading through the center gap in the opposite direction.
Thread both tags through center Both tags now point in opposite directions through the center gap.
Wet and pull Moisten thoroughly, pull both main lines firmly to compress the wraps into a neat barrel. Trim tags flush.

Both lines must be within one or two line weights — blood knots fail when diameters differ significantly.
Five wraps each side is standard. Use four wraps for lines heavier than 15 lb.
The two tag ends must exit the center gap in OPPOSITE directions — if both point the same way the knot will slip.
Tighten slowly and evenly — rushing creates uneven coils and weak spots.