Preserving Handmade Hot Process Oatmeal Soap
คำถาม
I am planning to make handmade oil soap using the hot process method and adding oatmeal.
When the soap gets wet, the oatmeal also gets wet, which I believe could become a source of microbial contamination.
Could you please recommend a preservative and advise on how to use it?
คำตอบ
Using Preservatives in Handmade Hot Process Soap with Oatmeal
For handmade hot process soap containing oatmeal, there is a risk that the wet oatmeal can become a breeding ground for microorganisms. Using a preservative is necessary to prevent contamination and extend the shelf life of the soap.
Since soap has a high pH (typically around 9-10), the chosen preservative must be effective in this high pH range. Based on the information, a suitable preservative is K940 Preservative.
K940 Preservative is effective in a very wide pH range, from 2 to 12, which covers the pH of soap well.
How to use K940 Preservative in Hot Process Soap:
- Use at a concentration of 0.5-2.5% of the total soap weight (1.0-1.5% is recommended for general formulas).
- Add K940 Preservative during the Cooling Down phase (after the main saponification process is complete and the soap temperature has dropped below 80°C), while the soap is still warm and easy to mix.
- Mix thoroughly before pouring the soap into molds.
Using K940 Preservative will help inhibit the growth of bacteria, yeast, and mold in your oatmeal soap, making your soap safer and improving its quality.
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