In general, a higher viscosity of the casting solution indicates a slower demixing rate in phase inversion, leading to a change in the membrane porosity structure and the formation of a sponge-like structure 36,41
For example, the Surgeon-Generals Report for Kids, when asking If smokeless tobacco was safer than cigarettes, answered NO WAY!, even though their elaboration of that point (and the official warning) made clear that the health problems were really quite different from those known for cigarettes
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