What Is Slip???

WHAT IS SLIP IN COSMETIC CHEMISTRY???

What is "Slip" in Cosmetic Chemistry?

In cosmetic formulation, “slip” refers to the perceived smoothness and glide of a product as it spreads across the skin or hair. It's a critical sensory attribute, especially in emulsions like lotions, creams, and conditioners. A product with good slip moves effortlessly over the surface during application, giving a luxurious, silky, or elegant feel.

The Science Behind Slip:

Slip is determined by the rheology and lubrication properties of the formulation and how well it reduces friction between the skin/hair and the product during spreading. Key scientific factors influencing slip include:

Viscosity: Thinner emulsions may have faster initial slip, while richer ones may have a more controlled glide.

Surface Tension Reduction: Ingredients that reduce surface tension between oil and water help improve spreadability.

Lubricity: Oils, esters, and silicones reduce friction and provide that signature gliding motion.

Ingredients That Contribute to Slip:

Silicones (e.g., Dimethicone, Cyclopentasiloxane): Offer excellent glide and leave a dry, smooth feel.

Natural Esters (e.g., Coco-Caprylate, Isoamyl Laurate): Provide a silicone-like feel for natural formulations.

Light Emollients (e.g., Squalane, Caprylic/Capric Triglyceride): Deliver smooth and light weight feeling.