Improving Stability and Adhesion of Iron Oxide Black in Hair Oil

To solve the issues of color separation, poor adhesion on white hair, and color transfer (rubbing off), I recommend adding the following components to your hair oil formula:

1. Prevent Color Separation

Since ReadyMix™ Iron Oxides Black is a physical pigment dispersed in oil, it is naturally heavier than the base oil and will eventually settle. To keep the pigment suspended:

• Oil Thick™ Thixotropic (Dextrin Palmitate): This ingredient acts as an oil gelling agent. It creates a network that holds the pigment particles in place, preventing them from sinking to the bottom. It also provides a better texture for application.
  • Usage: 2-5% for a thick liquid or 6-10% for a gel texture. It requires heating to approximately 75-95°C to dissolve into the oil.

2. Improve Adhesion and Prevent Color Transfer

The reason the color rubs off easily is that there is no "glue" to hold the pigment onto the hair shaft. You need a film-forming agent:

• Hydrogenated Polycyclopentadiene (C13-15 Alkane Base): This is an oil-based film former. Once applied, it creates a thin, water-resistant film that locks the pigment onto the hair. This significantly reduces color transfer to hands or clothing and helps the color stay on the hair longer.
  • Usage: 5-15% depending on the desired level of durability.

3. Achieve a "Dry" and Non-Greasy Feel

To help the product set quickly and not feel overly oily after application:

• C9-12 Alkane (Natural Silicone Replacer): This is a volatile natural oil that behaves like Cyclopentasiloxane (D5). It helps the formula spread easily across the hair and then evaporates, leaving behind the pigment and the film former for a drier, more permanent feel.
  • Usage: 5-20% as a replacement for part of your base oil.

Summary Recommendation

To create a "Hair Color Touch-up Oil" that is stable and long-lasting:

1. Base Oil: Use a combination of your preferred hair oil and C9-12 Alkane.
2. Thickener: Add Oil Thick™ Thixotropic (heat to dissolve) to prevent separation.
3. Film Former: Add Hydrogenated Polycyclopentadiene to prevent the color from rubbing off.
4. Color: Continue using ReadyMix™ Iron Oxides Black at your desired concentration.

Note: Please keep in mind that Iron Oxides are physical pigments that provide temporary coverage. They will eventually wash out with shampoo and do not change the hair structure like permanent chemical dyes.