Liquid Eyeliner Formulation Advice

Regarding your liquid eyeliner formula containing Water, Butylene Glycol, Isododecane, Propylene Glycol, Polyaminopropyl Biguanide, and CI 77266:

To address the compatibility of Isododecane (an oil/silicone-like ingredient) with water and improve the overall formula stability and performance, consider the following:

• Stabilizer/Thickener: Adding a thickener and emulsion stabilizer like Sepimax Zen can help keep the Isododecane and the black pigment (CI 77266) dispersed evenly in the water base. It also helps control the flow and application of the eyeliner.
• Film Former: A crucial component for liquid eyeliner is a film former. Adding a water-based film former such as Polyacrylate-21 will help the eyeliner dry down to a smudge-resistant and long-lasting film on the skin.
• Pigment Dispersion: Ensuring the black pigment (CI 77266) is well-dispersed is vital for intense color payoff and preventing settling. This might require a specific dispersing agent designed for pigments in water-based systems.

By incorporating a suitable stabilizer/thickener and a film former, along with ensuring proper pigment dispersion, you can create a more stable and effective liquid eyeliner formula.