Art of stabilizing rayon type fabric

Claim 1

THE PROCESS OF TREATING TEXILE FABRIC OF RAYON TYPE BY SUBJECTING THE FABRIC WHILE MAINTAINED IN THE OPEN WIDTH TO AQUEOUS SOLUTION OF CAUSTIC ALKALI IN CONCENTRATION OF 30 TO 50 PER CENT AT A TEMPERATURE OF 20 TO 60 DEGREES C. FOR A PERIOD OF TIME VARYING SUBSTANTIALLY INVERSELY WITH THE SPEED OF PENETRATION OF CAUSTIC INTO THE FABRIC, SAID PERIOD OF TIME BEING BUT A FEW SECONDS WHERE THE FABRIC IS RAPIDLY SATURATED WITH SAID CAUSTIC SOLUTION, SQUEEZING UNTIL THE FABRIC RETAINS 60 TO 100 PER CENT OF CAUSTIC SOLUTION BASED ON THE FABRIC WEIGHT, AND, WITHIN A PERIOD WELL UNDER ONE MINUTE AFTER THE START OF THE CAUSTIC IMPREGNATION, NEUTRALIZING DIRECTLY WITHOUT PRIOR DILUTION OF THE CAUSTIC IN THE TREATED FABRIC, WASHING THE FABRIC SUBSTANTIALLY TO FREE IT OF THE NEUTRALIZED IMPREGNATING AGENST, DRYING THE FABRIC AND ADJUSTING TO PREDETERMINED WIDTH, ALL OF SAID STEPS BEING PERFORMED UNDER SUBSTANTIALLY SLACK CONDITION OF THE LENGTH OF THE FABRIC WITH RESULTANT STABILIZATION AT A LENGTH CONTRACTION MATERIALLY LESS THAN THAT INCURRED IN CONVENTIONAL SHRINKAGE TREATMENT.