Gentle Preservative and Compatible Cream Maker for Face Mask

It sounds like you're looking for a gentler preservative for your face mask formulation, as Phenonip® P4 caused irritation. You're also facing compatibility issues with Eye Preserved™ and Luxury Cream Maker™. Mild Preserved Eco™ is a good option to consider.

Mild Preserved Eco™ vs. Phenonip® P4

Mild Preserved Eco™ (Ethylhexylglycerin, 1,3 Propanediol) is known for being gentle and is not classified as a traditional preservative by regulatory bodies. It works by enhancing the effectiveness of other antimicrobial agents and disrupting microbial cell membranes. While its mechanism is different from Phenonip® P4, it can effectively preserve cosmetic formulations.

Using Mild Preserved Eco™ at 1% is within the general recommended usage rate (1.0-1.5%). However, for formulations containing natural ingredients like Kaolin, which can increase the risk of microbial contamination, a higher concentration (up to 2%) might be recommended for optimal preservation, or combining it with another broad-spectrum agent, as per the product information. Since you want to use 1%, it's a valid starting point, but consider challenge testing to ensure sufficient preservation for your specific formula, especially with Kaolin present.

Cream Maker Compatibility

Regarding the incompatibility of Eye Preserved™ (Polyaminopropyl Biguanide) with Luxury Cream Maker™ (Sodium Polyacrylate (and) Polyisobutene), this is expected. Polyaminopropyl Biguanide is a cationic ingredient, which can react negatively with anionic polymers like Sodium Polyacrylate found in Luxury Cream Maker™, leading to instability or thickening issues.

Compatible Cream Maker for Mild Preserved Eco™ and Kaolin Mask

Since you need a cream maker that mixes in water and is compatible with Mild Preserved Eco™ for your Kaolin mask, CreamMaker EG™ is a suitable option. It is a thickener and stabilizer that is easy to use in cold process formulations and can be added directly to the water phase. It works well across a wide pH range (5.5-12), which is compatible with Mild Preserved Eco™ (pH 4-9), and is suitable for various applications, including masks containing ingredients like Kaolin. The recommended usage rate for CreamMaker EG™ is typically 1-3%.

In summary, Mild Preserved Eco™ is a gentler alternative preservative. For a cream maker compatible with Mild Preserved Eco™ in a water-based Kaolin mask, CreamMaker EG™ is a recommended choice.