5. What does combing do to the wool?
6. Why is there another operation of gilling after combing?
7. What is meant by drawing? spinning?
8. What name is given to the wool wound on the pencil?
9. On what does the fineness of the yarn depend?
Experiment 17—Difference between Woolen and Worsted Yarn
Apparatus: Pick glass.
Materials: Sample of woolen cloth and worsted cloth.
References: Textiles, pages [50] and [51].
Directions
Take a piece of worsted fabric and separate a piece of yarn from either the warp or filling. Do the same with a piece of woolen fabric. Notice the appearance of each piece of yarn. Which is smoother? What effect would friction have on the worsted yarn? the woolen yarn? Which sample of yarn would shine and reflect the light?