Reducing Air Bubbles in Gel Formulation
Asked by: egg.jongkolnee
On: May 05, 2023
Product Type:
Cosmetics
Question
How to reduce excessive air bubbles in a clear acne treatment gel formulated with Aristoflex AVC and Xanthan Gum thickeners?
Answer
Air bubbles in gel texture are a common issue, especially when using gum-type thickeners like Xanthan Gum. This often occurs due to mixing too quickly or whipping air into the gel during mixing.
Here are some tips to reduce the amount of air bubbles:
- Mix Slower and Gentler: Avoid using high-speed mixers or whipping that incorporates air into the gel. Try stirring slowly and consistently instead.
- Preparing Thickeners:
- For Xanthan Gum: Try pre-dispersing the Xanthan Gum powder in a non-solvent liquid like Glycerin or Propylene Glycol at a ratio of 1:1 or 1:2 (Xanthan Gum : liquid). Stir until it forms a paste, then slowly add this mixture to the water phase while stirring gently. This method helps prevent clumping and significantly reduces air bubbles.
- For Aristoflex AVC: Although it disperses more easily than Xanthan Gum, it should still be mixed at a moderate speed, not too fast.
- Allow the Gel to Rest (De-aeration): After mixing is complete, let the gel sit for a while (this might take several hours or overnight). Small air bubbles will gradually rise and dissipate on their own. Cover the container to prevent contamination.
Mixing patiently and allowing the gel to rest will significantly help reduce the issue of air bubbles.