{TAIL ~ A treated fibrous polyamide substrate} having {HEAD ~ resistance} to staining by acid colorants is provided 
{ TAIL ~ A treated fibrous polyamide substrate } having { HEAD ~ resistance } to staining by acid colorants is provided
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH