1. A PROCESS FOR THE PRODUCTION OF HIGH TENACITY, HIGHLY FATIGUE RESISTANT, VISCOSE RAYON YARN WHICH COMPRISES INCORPORATING A QUATERNARY DERIVATIVE OF AN ETHOXYLATED AMINE INTO A VISCOSE SOLUTION, EXTRUDING THE SOLUTION THROUGH A SPINNERET INTO AN AQUEOUS SULPHURIC ACID COAGULATING BATH CONTAINING ZINC SULPHATE AND 8002000 P.P.M. OF A LONG CHAIN ALIPHATIC TERTIARY AMINEETHYLENE OXIDE CONDENSATE TO FORM A FILAMENTARY YARN THEREFROM AND WITHDRAWING THE YARN FROM THE BATH AND AFTERTREATING THE SAME.