Cream Liquefied and Spoiled After Adding Preservative
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I followed all the steps in a video to make a cream. Everything seemed fine until I added the preservative. After adding the preservative, the cream became liquid and spoiled, developing a bad odor. I followed all instructions in the video. What could be the reason for this?
คำตอบ
Cream Liquefied and Spoiled After Adding Preservative
It sounds like the preservative you added did not function correctly, leading to the cream becoming liquid and spoiling with a bad odor. This can happen for several reasons:
- Incompatibility: The preservative might be incompatible with other ingredients in your cream formulation, such as emulsifiers or thickeners. This can break the emulsion, causing the cream to liquefy.
- Incorrect pH: Many preservatives are only effective within a specific pH range. If the pH of your cream is too high or too low for the preservative you used, it will not prevent microbial growth, leading to spoilage. For example, some preservatives like NaturePreserve™ Ultra work best in a pH range of 3-6, while others like Mild Preserved™ COS are effective from pH 2-8, and NaturePreserve™ LB2 from pH 2.0-6.5.
- Temperature Sensitivity: Some preservatives can be degraded by heat. If you added the preservative when the cream base was too hot, it might have become ineffective. For instance, Mild Preserved™ COS should be added below 45°C, NaturePreserve™ LB2 below 50°C, and Phenoxyethanol P5 below 80°C.
- Incorrect Usage Rate: Using too little preservative will not provide adequate protection.
- Contamination: If the ingredients, equipment, or environment were not clean, the cream could have been contaminated with microorganisms before the preservative could act.
To prevent this from happening again, please check the specific instructions for the preservative you used. Pay close attention to:
- The recommended usage rate.
- The temperature at which it should be added to the formulation.
- The required pH range for it to be effective.
- Any listed incompatibilities with other common cosmetic ingredients (e.g., NaturePreserve™ Ultra is incompatible with Vitamin C).
Ensure all your equipment and workspace are thoroughly cleaned and sanitized before making your cream. If you are developing products for sale, performing a challenge test is crucial to confirm the preservative's effectiveness in your specific formula.
