Line Tests
Test the line before the line tests the room.
Raope line tests are small observations, not laboratory claims. They ask a maker to slow down and notice how a cord behaves around surfaces, corners, knots, hands, dust, moisture, and repetition. The method suits ordinary studio and field situations where a person can inspect the setup directly and choose a calmer alternative before tension becomes hidden inside the system.
Bend radius
Look for sharp turns that flatten fibers or make a knot carry load on a tiny corner. A larger curve is often a better safety choice than a more impressive knot.
Abrasion story
Check the places that rub, not only the places that look dirty. Repeated movement can polish, fuzz, or glaze the same inch until the rest of the line looks innocent.
Stretch behavior
Mark a reference point, load gently, then watch whether the line returns or keeps length. A line that creeps is telling you how the final setup will drift.
Tail security
Measure the tail after repeated handling. If the tail shortens during a simple shake or pull test, the knot is not finished for public use.