Licensed to About.com, Inc. Definition: Moleskine is a brand of notebook that comes in various formats, sizes, and papers. The covers are usually black leather (some special editions have silk, for instance, and diaries come in red) and there is an elastic band for keeping it closed.
3-3-4 Viscosity Stability of the aqueous solution The viscosity of PVA(Polyvinyl Alcohol) aqueous solution for fully hydrolyzed grades increases, according to storage time, and a gelation occurs.
The degree of swelling, in water, of the polyvinyl alcohol film is also important. The viscosity and stability of a highly concentrated Water solution of polyvinyl alcohol and the degree of swelling in water of the film will vary with the conditions of polymerization used to produce the precursor polyvinyl acetate.