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Is it possible to use a refractometer to measure the viscosity of honey because as we know, a refractometer is used to measure moisture and therefore water influences the viscosity of honey so is there a way that we can use to measure the viscosity of honey that way or using any other method apart from time since time has a high percentage of uncertainty?

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Theoretically, if refractive index and viscosity are both simply functions of moisture content, you should be able to use one to approximate the other using an empirical standard curve. However, based on this paper, it looks like the relationship between moisture content and viscosity at 25C can vary quite a bit between different types of honey, expecially down below ~18% moisture. So I'd be pretty hesitant to rely on refractive index for acurate viscosity measurements unless you first rigerously validate your methodolgy against empirical viscosity measurements.

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