Oil to Emulsifier Ratio for Lightweight Lotion with Olivem 1000
Question
I am formulating a lotion with the following characteristics:
- Texture: Lightweight, milky, non-greasy
- Foaming: Minimal soaping
- Target Skin: Dry skin
I am using Olivem 1000 as the emulsifier. What is the recommended oil to Olivem 1000 ratio for this type of lotion?
Answer
For your lightweight, non-greasy, milky lotion targeting dry skin with minimal soaping, Olivem 1000 is an excellent choice. Its description highlights that it "does not have a soapy effect when applied" and offers "Built-in thickening without the need for a thickener or gel maker," which aligns perfectly with your desired characteristics.
For a low consistency product like a lotion, the recommended usage rate for Olivem 1000 is 3-4% of your total formulation.
To determine the oil to emulsifier ratio, you'll need to decide on the percentage of your oil phase. For a lightweight lotion, a typical oil phase can range from 10% to 20%.
Here's how you can calculate the ratio:
- If you use 3% Olivem 1000:
- For a 10% oil phase, the oil to emulsifier ratio would be approximately 3.3:1 (10 parts oil to 3 parts Olivem 1000).
- For a 15% oil phase, the oil to emulsifier ratio would be 5:1 (15 parts oil to 3 parts Olivem 1000).
- If you use 4% Olivem 1000:
- For a 10% oil phase, the oil to emulsifier ratio would be 2.5:1 (10 parts oil to 4 parts Olivem 1000).
- For a 20% oil phase, the oil to emulsifier ratio would be 5:1 (20 parts oil to 4 parts Olivem 1000).
Therefore, a good starting point for your oil to Olivem 1000 ratio for a lightweight lotion would generally be in the range of 2.5:1 to 5:1, depending on your desired oil phase and the specific oils you are using. You may need to experiment within this range to achieve your ideal texture and feel.
