Determination of changes in viscosity of chitosan cosmetic preparations depending on shear rate.

The rheological characteristics of chitosan were made on the basis of a viscosity measurement using a Brookfield viscometer, using LV SC4 - 25 spindles and shear rates from 0.3 to 32 s-1 (Fig. 1). Chitosan solutions at 1% concentrations in acetic acid were prepared. The samples were subjected to storage tests.
The data allowed to characterize the used chitosan preparations and assess their functional parameters as substances modifying the rheology of cosmetic solutions. Fig.1. Brokfield rotational viscometer - model DV-III +.