The Science of Chalk and Friction

Chemical Absorption of Moisture

• Magnesium carbonate acts as a desiccant to absorb sweat from the epidermal layer.
• This reduction in surface humidity significantly increases the coefficient of friction.
• A dry skin surface prevents micro-tears that often occur during high-tension crimps.

Protective Barrier Formation

• A layer of powder creates a non-stick interface between skin and rock texture.
• It reduces the direct abrasive impact of rough granite or textured sandstone.
• Regular application prevents the buildup of dead skin cells that compromise grip.

By mastering the application of chalk, climbers can extend the duration of their sessions without compromising skin integrity.