Formula Review and Answers

Your formula is generally well-composed for targeting skin brightening and acne concerns, incorporating ingredients like Alpha Arbutin, Vitamin B3, and Glucosamine known for these benefits, along with nourishing Avocado Oil and soothing Bisabolol.

Does this formula require heat?

No, this formula does not require heat. As confirmed by the staff and indicated by the properties of the ingredients, you should mix all components at room temperature. Heating should be avoided, especially for ingredients like Alpha Arbutin, which can degrade at higher temperatures or incorrect pH.

Why was the cream liquid, and how to fix it?

You experienced a liquid consistency because the amount of Light Cream Maker at 1% was likely insufficient to emulsify the oil phase (Avocado Oil) and thicken the water phase to a cream consistency.

To fix this, increase the concentration of Light Cream Maker to 1.5-2.0% as recommended by the staff. This should help create a stable emulsion and the desired cream texture. Ensure thorough mixing or blending to properly activate the cream maker.

How long can this cream be stored (shelf life)?

The shelf life of your cream depends primarily on the effectiveness of the preservative system and the storage conditions. You have included Phenoxyethanol at 1%, which is a common preservative.

While Phenoxyethanol helps prevent microbial growth, the exact shelf life requires a challenge test to confirm its efficacy in your specific formula.

However, you can maximize the shelf life by:

• Storing the cream in a cool place, away from direct sunlight and heat.
• Ensuring the container is tightly sealed.
• Note that some ingredients like Alpha Arbutin and Natural Bisabolol are recommended for long-term storage in the refrigerator. While the final cream might not need refrigeration if properly preserved and stored at room temperature, keeping it in a cool, dark place is best practice.

Generally, with proper preservation and storage, a cosmetic cream can last from 6 months to 2 years. Always observe the cream for any changes in color, odor, or texture, which could indicate spoilage.

General Mixing Tips

Based on the ingredient properties:

1. Combine the water phase ingredients (Water, Alpha Arbutin, Vitamin B3, Glucosamine, Phenoxyethanol). Stir until fully dissolved. Ensure the temperature is below 30°C when adding Alpha Arbutin. Check the pH is within the recommended range for the active ingredients (ideally between 4.0-6.5).
2. Combine the oil phase ingredients (Avocado Oil, Bisabolol, Light Cream Maker). Stir to disperse.
3. Slowly add the oil phase to the water phase while continuously stirring or blending until a uniform cream is formed.
4. Ensure thorough mixing to achieve the correct texture and stability.

Remember to use a beaker or similar container for accurate weighing, as suggested by the staff.