SHRINKAGE TESTING FOR ACRYLIC YARN

PROCEDURES:

STEP 1: PREPARE A LEA OF 120 YARDS BY MEANS OF WRAP REEL

STEP 2: HANG ONE END OF THE LEA FROM A PEG AND PUT A WEIGHT OF 100GMS ON THE OPPOSITE END TO KEEP IT VERTICALLY STRAIGHT

STEP 3: MEASURE THE LENGTH OF THE LEA (SAY L1) VERTICALLY WITH THE HELP OF A SCALE

STEP 4: PUT THE LEA ON A FULLY COVERED STEEL BOX

STEP 5: PUT THE STEEL BOX WITH THE LEA ON A PRESSURE COOKER CONTAINING 1.5 LITRES OF WATER AND HEAT IT ON AN OVEN FOR 30 MINUTES

STEP 6: TAKE OUT THE LEA FROM THE STEEL BOX AND HANG IT AGAIN ON A PEG FROM ONE END WITH 100 GMS WEIGHT ON THE OPPOSITE END

STEP 7: MEASURE THE NEW LENGTH (SAY L2) OF THE LEA WITH THE HELP OF A SCALE

FORMULA:

SHRINKAGE % = (L1-L2) X 100

                                  L1