Abstract
A staining technique is discussed which has been presented as an alternate method for differentiating the skin-core effect of viscose rayons. This technique, using silver nitrate solution, furnishes good results, generally corresponding to those obtained by the usual methods employing normal dyes. The staining, however, proceeds in a quite different manner from these dye methods, thus suggesting a different mechanism.
Several cellulosic rayons have been examined and a number of factors have been evaluated regarding their influences upon the silver staining. The staining in question is chemical, immediately associated with the accessible reducing end groups in cellulose; therefore it is possibly a measure of the degree of accessibility of regenerated cellulose fibers.
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