the feasibility of using the afn as a stand alone finish applicator guide and its ability to improve uniformity of finish distribution on the applied yarns were evaluated to accomplish this task finish neat and from 10 emulsion was applied onto 126 34 finish free polyester yarn application speed was set at 200 m min and target foy finish on yarn level was 1 the schematic of the application rig is shown in fig4 operating air pressure for the afn was set at 2 bar for all experiments lurol pt 128 was used as the finish and in order to characterize finish uniformity a fluorescent tracer was added at 0 1 w w to the oil base after conditioning the applied yarns were examined by high resolution dynamic fluorometry to characterize finish uniformity dynamic fluorometry tests were run at 5 4 m min and 30 hz acquisition frequency at these test conditions resolution is 3 mm for the length of the yarn this test yields an absolute mean and a percent cv coefficient of variation which is equal to standard deviation divided by the mean the absolute mean is a direct measure of the finish level on the yarn while the cv is a quantitative characteristic of finish uniformity the lower the cv the better the uniformity of finish distribution along the yarn actual finish levels foy were determined by cold solvent extraction with an isopropanol hexane mixture the foy was determined using the isopropanol hexane cold solvent method generated results are summarized in table 2 data in table 2 shows that the afn indeed improves uniformity of finish distribution in both cases of neat and emulsion application it also provides finish levels closer to the theoretical.