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To check
impurities and sediments measure 200ml in 10% by weight lotion and dissolve.
Then pour test tubes and put inside the centrifuge. Sediment = 3/6 impurities
6/6 is major impurities
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To check tubidfy
we sue the turbidio meter turbididy = 100 against 0.1
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Refractive index – we use refratometer to
check deictic the refractive index which is a lest pricey. The unit is in brix
observation line refrectometer, from zero down changed to white while upwards
is blue showing that the refractive index of water is zero. Refraction index of
lotion is open the refractmetes and put some quality to the lotion and violent
it at the other edge.