Apparatus to measure the viscosity of toothpaste
Hello Chemist Corner.
I have just landed my first formulation chemist job at a small cosmetic company specializing in Oral Care. The company hasn’t had a designated cosmetic chemist before and have previously outsourced their testing. As such the first requirement of my job is setting up a cost-efficient lab that will allow me to undertake some preliminary accelerated testing on new toothpaste prototypes. Supposing new products meet these preliminary testing results they will then be validated at commercial testing labs, who have more advanced and precise apparatus.
I will be predominantly formulating toothpaste and one of the measurements I was wanting to use was viscosity. However upon researching the viscosity properties of Toothpaste i.e. plastic/pseudoplastic with high viscosity: ~ 100,000 cps it became evident that I would need quite advanced and expensive laboratory equipment, which is out of my allocating lab set up budget.
Therefore I am looking for some advice on a cheap apparatus/procedure that would be sufficient to test the viscosity of toothpaste (if it exists)? Or some advice on whether or not testing the viscosity is necessary for such preliminary testing of a product.
Thanks in advance
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