Using Titanium Dioxide Pigment in Soap Making

Regarding your question about adding Titanium Dioxide Pigment to the oil phase when making natural oil soap:

Based on the product information for pigment-grade Titanium Dioxide such as Titanium Dioxide 250nm Pigment (Non-Treated), Titanium Dioxide 300nm Pigment (Non-Treated, Color-Controlled), and Titanium Dioxide 250nm Pigment (Non-Treated, Eco), the recommended mixing method is to disperse them in water. Their solubility is listed as "Can be dispersed in water."

Therefore, these types of Titanium Dioxide pigment are designed to be added to the water phase when making soap, not the oil phase. Dispersing them in water first will help ensure they are evenly distributed throughout the soap mixture for consistent whitening.