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Problème de décantation
Hello everyone,
I’m currently experiencing a major problem that I need your help with.
I initially thought that the issue of opacifier settling at the bottom of the bottle had been resolved. Unfortunately, this is not the case in our situation.
We use an economical opaque shower gel formula that meets the following technical specifications:
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pH between 5.5 and 6.5
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Minimum viscosity: 4000 cP at 20°C
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The procedure followed is as follows: water and opacifier are added at the beginning of production, surfactants are added, then perfume is added. Salt is added at the end of the process to adjust the viscosity.
During stability tests, no deposit was observed after 3 months, both at room temperature and at 45°C. A slight drop in pH was observed at room temperature (from 6.2 to 5.6), with no visible change in appearance.
However, after 6 months of storage at room temperature, a deposit of opacifier appeared at the bottom of the bottle. Conversely, samples stored at 45°C remain perfectly stable, with no signs of sedimentation.
This situation is stumping me, because I can’t explain this differential stability phenomenon between the two conditions.
Do you have any ideas or interpretations on this subject?
The opacifier used is EMPICOL OP 301.
Here are some additional details about the formula:
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Total active ingredient content: approximately 7%
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Salt content: ≤ 2%
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Fragrance: 1%
TYSS
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This discussion was modified 8 hours, 22 minutes ago by
Perry44.
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