Concluding part of H. Stadlinger's laboratory comparison of five commercial cellulose acetate rayons (Setilose, Celanese, French and German Rhodiaseta, and Aceta). It reports tests of dry, wet, boiled and knotting tensile strength, breaking elasticity, titer, sorting defects, gloss, color, ultraviolet fluorescence, dyeing with Cellit fast dyes, acetic acid content, viscosity and oil content. Micrographs of fiber cross-sections illustrate how ribbon-shaped filaments gave way to multi-lobed round forms and how this affects gloss. The article ends with eleven numbered conclusions on suitability for knitting, weaving and dyeing.