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A comment on Alex Honnold Scales El Capitan Without Ropes, and the Climbing World Reels. Parent comment
You would not want to use chalkboard chalk for climbing, as it would make holds actually slipperier.
Some climbers do carry a piece of chalkboard chalk to mark key holds, though.
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You would not want to use chalkboard chalk for climbing, as it would make holds actually slipperier.
Some climbers do carry a piece of chalkboard chalk to mark key holds, though.