Formulating Grey Hair Coverage Shampoo with Specific Ingredients

Yes, it is possible to combine the ingredients you mentioned to create a color-depositing shampoo, often used for covering grey hair. This type of product combines hair colorants with a shampoo base.

Here's a breakdown of the ingredients and their roles in such a formulation:

• SemiColor - Wood Black and ColorFix™: These are the key components for providing the black color to the hair. SemiColor is a semi-permanent hair colorant, and ColorFix™ is designed to improve color uptake and longevity.
• N70 (Sodium Laureth Sulfate) and Coco Betaine (Cocamidopropyl Betaine): These are primary and secondary surfactants, forming the cleansing and foaming base of the shampoo. Sodium Laureth Sulfate is an anionic surfactant providing good lather and cleaning, while Cocamidopropyl Betaine is an amphoteric surfactant that helps boost foam, reduce irritation, and can improve viscosity.
• Cocamide DEA: This is a nonionic surfactant often used as a foam booster and viscosity builder in shampoo formulations.
• NaCl (Sodium Chloride): Common salt is used as a thickener in surfactant systems like those based on Sodium Laureth Sulfate and Cocamidopropyl Betaine.

Formulation Considerations and Proportions:

Creating a stable and effective color-depositing shampoo requires careful formulation and testing. While I can provide general ranges for the shampoo base components, the optimal percentage for the colorants (SemiColor - Wood Black and ColorFix™) will depend heavily on the desired color intensity, the specific strength of the colorant product, and how well it interacts with the base formula.

General starting points for the shampoo base ingredients might be:

• Sodium Laureth Sulfate (N70): Typically used at 10-25% active surfactant matter in shampoo formulas.
• Cocamidopropyl Betaine: Often used at 2-10% active surfactant matter.
• Cocamide DEA: Can be used at 1-5%.
• Sodium Chloride: Used to adjust viscosity, typically in the range of 0.5-3%. The exact amount needed will depend on the surfactant system and desired thickness.

It is important to note that formulating color-depositing shampoos can be complex due to the interaction between the dyes and the surfactant system, which can affect color stability, deposition, and wash-off. pH adjustment is also crucial for both the stability of the colorants and the performance of the surfactants.