C.  Type of weave patterns:  In a weave, the lengthwise yarn is called warp.  It is usually stronger, smoother, and more even, with a tighter twist to it than the weft, which is the crosswise yarn.  The warp need not be the same material as the weft (this would be called a blend), nor the same color.  Sometimes, the warp and the weft have different diameters in order to produce special effects, such as ribbing.
1.  Cut off a small square (about 3 inches by 3 inches) of fabric and place under your microscope.
2.  Examine each piece and do the following:  identify the fiber, draw the weave pattern below, label which is the warp and which is the weft, and write a description for each pattern.

Fiber  ___________________

Description	
Fiber  ___________________

Description	
Fiber  ___________________

Description	

Fiber  ___________________

Description	
Fiber  ___________________

Description	
Fiber  ___________________

Description	

D.  Answer the following questions concerning both parts A and C:
1.  What properties of the known fibers did you observe?

2.  What additional properties of fibers did you learn about that could increase the odds of finding a match between fiber samples?

3.  Can you differentiate between plain, twill, and satin in the fabric samples you examined in part C?  Are there any blends?