Creating Stable and Consistent Formulas Without Guesswork
Of all the skills you need to master in natural cosmetics, the most important one is that of stability and consistency. A stable product doesn’t separate, it keeps its texture, and it acts the same over time. A consistent product feels the same from batch to batch even if the ingredients you’re using differ a bit. These results don’t happen by chance. They happen because you know how to formulate and you have a system. And when you have stability in your system, your products feel more professional, and you feel more confident because you know exactly how they will turn out before you make them.
In particular, getting a handle on the relationship between the water phase and the oil phase is really important. Understanding the emulsifier that’s necessary for binding them together (for creams and lotions—balms and oils are more about finding harmonious oils and butters!) can really help your creations stay smooth and prevent them from separating. That’s the kind of knowledge that will help you create robust formulas that don’t need constant fiddling with or second guessing.
Another thing to keep in mind is the temperature and mixing technique. For a lot of new soapmakers, this plays more of a role in stability than they give credit to. Getting things to the right temperature, mixing in the right order, cooling them down slowly. It’s not so much about getting it right, as it is about getting it the same way each time. You start to see how little variations impact the result, and your process becomes one you can count on to get the same result each time. That’s when you really start to have a craft, when each successive batch is part of a progression.
The other factor is the quality of ingredients and how they work together. Natural ingredients can differ in texture, color, or efficacy depending on where they were sourced and how they were processed. Knowing how to formulate with ingredients in mind is key. For instance, an oil may feel greasier or slower to absorb than you anticipated. An extract can change the color or fragrance of a product. A formula that is designed with this in mind and utilizes ingredients that play nice together to make a balanced final product is going to have fewer unexpected results.
Last, but not least, documentation and testing. Writing down the simplest of notes about the measurements you used, the temperatures, and what you saw will help you to repeat a batch that you love, and not repeat one that you hate. Testing your products under different circumstances will ensure that they will remain stable over time, and in the course of your daily life. This isn’t about getting it just right, it’s about having confidence in what you do. Once you have confidence that your formulas are stable, and consistent, you can be more free to create, and know that your products will still perform the same as you continue to hone your craft.
