The treated substrate comprises a fibrous polyamide substrate having applied thereto a partially sulfonated novolak resin and polymethacrylic acid, copolymers of methacrylic acid, or {HEAD ~ combinations} of said polymethacrylic acid and said copolymers of {TAIL ~ methacrylic acid} 
The treated substrate comprises a fibrous polyamide substrate having applied thereto a partially sulfonated novolak resin and polymethacrylic acid , copolymers of methacrylic acid , or { HEAD ~ combinations } of said polymethacrylic acid and said copolymers of { TAIL ~ methacrylic acid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL