Glossary
Friction
The resistance between skin and a surface. Chalk changes the moisture, not a published coefficient you can shop by.
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Friction is why a dry fingertip sticks on a hold and a sweaty one slides. Chalk is used because dry skin usually grips better than wet skin on stone, wood, and steel knurl. This site does not quote a friction coefficient for any product. A single number from a blog would depend on the surfaces, the force, and the moisture, and it would not survive contact with your gym.
Tack from rosin is a different mechanism from dry friction. It can feel stickier and still be the wrong choice when the rules ban additives that change the hold.
SPORTMEDIQ Pro Grade Liquid Chalk
Liquid chalk whose listing title names the gym, weightlifting, rock climbing, and gymnastics. This is the bottle the old site linked for every article.
The title says it dries in seconds. That is the brand's claim. Wait until the coat looks dry before you pull.
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