PURPOSE:
Measure the following:
v Fabric weight by square yards
v Crimp Percentage
Following are a few general rules to find out the warp and weft direction of the fabric:
Ø The threads that run parallel to the selvedge are the warp threads.
Ø Weft threads are generally more stretchable.
Ø There are more warp threads as compared to weft threads per square inch.
Ø Yarns which are more aligned and less hairy are the warp threads.
WEIGHT BY SQUARE YARDS
PURPOSE:
To find the Weight by Square Yards of the fabric.
MATERIALS:
- Weighing Balance
- Fabric Scissor
PROCEDURE:
v Cut a Swatch of 6” x 6” using Fabric Scissor.
v Weigh the cutting piece using a weighing balance.
v Convert 6” x 6” into 36” x 36” i.e. yards.
v Calculate the weight per square inch as shown in the results.
RESULTS:
The results of the specimen enclosed are:
Weight of 6” x 6” = 2.72 gm
Weight per square yards = 36” x 36” x 2.72
6” x 6”
= 97.92 gm
CRIMP PERCENTAGE
PURPOSE:
To calculate the crimp percentage of warp and weft threads.
MATERIALS:
PROCEDURE:
v Pull one of warp thread and one of the weft thread.
v Cut the threads to get a length of 6 inches using a scale.
v Stretch each thread of both weft and warp threads and then measure the length of the thread (Final Length).
v Following formula is used to find the Crimp Percentage:
Crimp Percentage = Final Length – Initial Length x 100
Initial Length
RESULTS:
S.No. | WEFT | WARP |
1 | 6.3” | 6.1” |
2 | 6.3” | 6.1” |
3 | 6.4” | 6.3” |
4 | 6.3” | 6.2” |
5 | 6.4” | 6.1” |
Average of warp threads is 6.16 inch
Average of weft threads is 6.34 inch
WARP THREAD:
Crimp Percentage = 6.16 – 6 X 100
6
= 2.66%
WEFT THREAD:
Crimp Percentage = 6.34 – 6 X 100
6
= 5.66%
Conclusion:
The result shows that weft threads have a more crimp percentage than warp threads. It means weft threads more stretch than warp threads
