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Water hardness
Dear all.
Can I check if water hardness affect shower gel base making? I have a shower gel formulation, when my colleague make the shower gel in Spain, the viscosity of the shower gel is stable after adding fragrance. But when I make the shower gel in Asia and after adding fragrance, the shower gel breaks viscosity, it turned watery and cloudy.
The salt content is 2.45%.
Does high salt content affect the compatibility of fragrance in the shower gel?
Appreciate if anyone can guide me on this. -
6 Replies
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Yes salt content affects viscosity. Do a salt curve analysis starting with 1% salt and go up from there
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What ingredient does it have and at what percentage?
Also do both of you use the same fragrance?
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Are you saying you both are using the exact same formula and ingredients from the same exact suppliers? This also plays a big role.
Some surfactants (the foaming ones) does not work well in hard water, some do and some help the others to work in hard water.
Does you formula contain chelating agent?
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Same ingredients only difference is deionised water from different country.
How to experiment on the salt curve? -
One quick way to check water hardness, is to visit the US EPA website. They publish the analysis of the public water they treat. In it, you should be able to see the calcium, magnesium and ion levels measured in the treated water samples. This is the reason why formulators use deionised water in their guide formulations, and still add chelating agents like EDTA, to further migitate the risks.
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