# Determine the crease recovery of fabric and observe effect of loading time and recovery time on crease recovery

Introduction: Crease recovery is an important property of textile materials that affects their appearance and durability. In this lab, we will determine the crease recovery of a fabric sample and observe the effect of loading time and recovery time on crease recovery.

Materials:

• Fabric sample
• Crease recovery tester
• Weights (500 g)
• Stopwatch

Procedure:

1. Preparation of the test sample: Cut a fabric sample with dimensions of 5 cm x 10 cm using scissors.
2. Measurement of initial angle of fold: Fold the fabric sample in half to create a crease. Use a protractor to measure the angle of the crease and record it as the initial angle of fold.
3. Loading time and weight: Place the fabric sample on the crease recovery tester and secure it in place with clamps. Place a weight of 500 g on top of the fabric sample and start the timer. Allow the weight to remain on the fabric sample for a specified time, such as 10, 20, or 30 minutes.
4. Removal of weight and observation of recovery: Remove the weight from the fabric sample and start the timer. Observe the fabric sample and record the time it takes for the crease to recover to a specified angle, such as 45, 90, or 135 degrees. Record the time it takes for the crease to recover as the recovery time.
5. Repeat the tests: Repeat steps 3 and 4 for different loading times, such as 10, 20, and 30 minutes, and different recovery angles, such as 45, 90, and 135 degrees.
6. Analysis of the results: Calculate the crease recovery angle using the initial angle of fold and the angle of recovery. Calculate the crease recovery rate using the recovery time and the loading time. Analyze the data using statistical methods, such as mean and standard deviation.
7. Observe the effect of loading time and recovery time on crease recovery: Plot the crease recovery rate versus the loading time and recovery time. Observe the effect of loading time and recovery time on crease recovery.

Conclusion: In this lab, we have determined the crease recovery of a fabric sample and observed the effect of loading time and recovery time on crease recovery. Crease recovery is an important property that affects the appearance and durability of textile materials. By evaluating the performance of different fabric samples, we can determine their suitability for various applications.