The Beal Rope Marker is a specially developed ink designed for marking the middle or any part of a climbing rope safely and without damage.
Tested by multiple companies and safe to use on most ropes, Beal rope Marker ink hardly stiffens the rope, is water resistant, and stands up to abrasion well. You apply with ink with a small roller that's supplied with the product for ease of use. The process will have a small effect on the suppleness and water resistance of the applied area, so make sure you do not put too much on. It will not affect the polyamides in the rope and when dry, the ink stands up well to general abrasion.