Lotion Separation Issue and Emulsifiers
คำถาม
I am making a lotion, but the ingredients are separating into oil and lotion/water phases. The only oil used is Natural Oil [url=http://www.myskinrecipes.com/shop/168-natural-oil-%E0%B8%99%E0%B9%89%E0%B8%B3%E0%B8%A1%E0%B8%B1%E0%B8%99%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4:19gyxxf1]. The separation is occurring between the oil and the rest of the lotion. I think I might be using the wrong type of oil. What kind of oil should I use to make all the ingredients combine properly?
คำตอบ
Understanding Lotion Separation
It sounds like you are experiencing phase separation in your lotion, where the oil and water components are separating. This is a common issue when making emulsions like lotions or creams.
The Role of Emulsifiers
The primary reason for this separation is the lack of a proper emulsifying system. Oils and water naturally repel each other. An emulsifier is a special ingredient that has parts that are attracted to both oil and water, allowing them to mix together stably and prevent separation.
While the type of oil you use can sometimes influence the stability of the emulsion, the most critical component for preventing separation is the emulsifier itself.
Recommended Solution: Use a Lotion Maker (Emulsifier)
To solve the separation issue, you need to incorporate a suitable emulsifier into your formulation. These are often referred to as "lotion makers" or "cream makers". They help bind the oil phase and the water phase together.
Based on available options, here are a few types of lotion makers that can help:
- Milk Lotion Maker™: A liquid emulsifier suitable for formulations with up to 40% oil. It creates a light, milky texture.
- Light Lotion Maker: An ECOCERT-certified emulsifier that also handles up to 40% oil and provides a light, non-sticky feel. It can be used in both hot and cold process methods.
- Mulse Lotion Maker™: A plant-sourced, PEG-free emulsifier that helps add moisture and gives a good skin feel. It's suitable for lotions and dissolves in the oil phase.
- LeciCream™: A natural emulsifier made from Hydrogenated Lecithin, suitable for heavier creams.
How to Use an Emulsifier
Generally, emulsifiers are added to either the oil phase or the water phase (depending on the specific emulsifier's instructions) and heated along with that phase. Then, while mixing, the heated oil phase is slowly added to the heated water phase (or vice versa) and mixed continuously until the emulsion forms and cools down.
Using the correct type and amount of emulsifier, along with proper mixing technique and potentially a thickener, will help ensure your lotion remains a stable, uniform mixture without separating.
Consider replacing or adding a dedicated lotion maker/emulsifier to your formula instead of relying solely on the natural oil to solve the separation problem.
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Milk Lotion Maker™
Light Lotion Maker