18 in which is formed a slot 20 and back surface 22 which terminates in a lower portion 22a the slot 20 runs from the top surface 12 to the bottom of the applicator body member and is defined by side walls 24 26 and bottom wall 28 a passage 30 connects the back surface 22 of the body member with the bottom wall 28 of the slot for supplying a liquid finish to the slot the yarn 11 runs from top to bottom of the applicator as indicated by the arrow the yarn filaments spread evenly across the slot and contact a portion 31 of the bottom wall 28 extending from just before or right at passage 30 to an exit edge 17 the body member 10 features a sharp wedge exit edge 17 formed by the bottom area of the slot and surfaces 28 22a respectively being angled toward each other and defined on the sides by tapering side surfaces 14 16 as best seen in fig4 the slot 20 is defined by side walls 24 26 and a bottom wall 28 the side walls 24 26 taper inwardly toward each other as they approach bottom wall 28 and also taper toward each other as they progress from the top of the applicator body member toward passage 30 the applicator body 10 is made of a molded ceramic that may be for instance chromium dioxide with some titanium dioxide or may.