That is, the more they are worked, the thinner they get, as indicated by decreasing viscosity values. But, by now, we all have come to the realization that paints are, by design, shear thinning. Rheogram testing (shear rate ramps) does provide useful information about the fluid's shear dependence. A goal for the meaningful viscosity measurement of paint is to get data that not only tells you if the paint is "ok", but also qualifies how the paint will perform during application, i.e., a test that is not too time consuming or overwhelming. However, like most things that are quick and easy, that may be all you get - not enough detail, only a ‘go'/‘no go' number. In a busy QC lab, or out on the production floor in a manufacturing plant, a quick and easy measurement is usually desirable.
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