Abstract
The process of solution is, considering its enormous importance, remarkably little understood. With nitrocellulose as with many other technical products the “ solution ” formed is of a colloidal nature ; that is to say, the ultimate units of dispersion are very large compared with the solvent molecules, and osmotic phenomena play an unimportant part. It is clear that solvation, or attachment of some or all of the solvent to the dispersed particles must be essential to the process of solution, but so far, comparatively little work has been done on solvation probably because of the lack of an unequivocal method for its determination. Yet the uncertainty concerning the solvation of colloidal particles is a source of difficulties in many investigations, to mention only a few, in the determinations of particle-size by settling or centrifuging, in viscosity work, and in light scattering experiments.
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