Formulating a Shimmer Toner to Prevent Sedimentation

To create a shimmer toner (น้ำตบ) where the mica does not settle at the bottom, you need to focus on two main factors: the particle size of the mica and the Yield Value (suspending power) of your formula.

1. Choosing the Right Shimmer

For a toner, it is recommended to use mica with a small particle size. Smaller particles are lighter and much easier to keep suspended than larger, heavier glitter particles.

• Recommended: Gold White Pearl Mica (Size A). This size provides a fine, silky pearl effect and is the easiest to suspend in low-viscosity liquids.

2. Using Xanthan Gum for Suspension

Using Xanthan Gum at 0.1-0.2% as you mentioned will provide a "slippery" feel and slightly increase viscosity, but it may not be enough to keep mica suspended permanently.

• Duration: At 0.1-0.2%, the mica might stay suspended for a few hours to a couple of days, but it will eventually settle to the bottom because the "Yield Value" (the force that holds particles in place) is too low at this concentration.
• Solution: To achieve permanent suspension using Xanthan Gum, you typically need a concentration of 0.5% or higher, which might make the toner feel too thick or sticky for some users.

3. Better Alternatives for a "Non-Settling" Toner

If you want a water-like toner that is not thick but can still suspend shimmer perfectly, consider these options:

• Use a Clear Xanthan Gum: If you stick with Xanthan, ensure it is a high-clarity version like Xanthan Gum (clear gel type) to keep the toner transparent.
• AnyGel™ (Dehydroxanthan Gum): This is a modified natural gum that often provides better clarity and slightly better suspension properties than standard Xanthan Gum.
• Dedicated Suspending Agents: For professional results where the shimmer stays perfectly suspended without making the liquid thick, formulators often use specialized polymers (such as Pro Polymer or Sugar Gel) which are designed specifically to provide high yield value at low viscosities.

Summary of Tips:

1. Mix Mica properly: Disperse the mica in a small amount of water or humectant (like Glycerin) before adding it to the main formula to prevent clumping.
2. Adjust Viscosity: If 0.2% Xanthan Gum isn't working, gradually increase the dosage by 0.1% until the mica stays suspended, or switch to a more powerful suspending agent.
3. Small is Better: Always opt for "Size A" or "Silk" grade micas for liquid toners.

Recommended Products:

• Gold White Pearl Mica (Size A): Fine particle size for easy suspension.
• Xanthan Gum (clear gel type): For a smooth, clear texture.
• AnyGel™ (Dehydroxanthan Gum): An alternative for better texture and clarity.