Unit 3 Lecture 17 Topic 3

Question 1

Basic weaves:

Answer 1

Fabrics woven on simple looms creating plain, twill, and satin weaves.

Question 2

Complex weaves:

Answer 2

Fabrics woven on complex looms creating double, dobby, pile, and jacquard weaves.

Question 3

Plain weave:

Answer 3

The most basic woven structure made of two sets of yarns - warp and weft (filling). Yarns interlace at every intersection with an alternate interlacement pattern (over, under, over).

Question 4

How can plain weaves be varied?

Answer 4

Many variations are possible, such as stripes and checks (achieved through the colour of yarns used), rib weaves (achieved through the size of yarns used and an unbalanced fabric count), or a basket weave effect (achieved when two or more yarns are worked together in a regular plain weave interlacement).

Question 5

Twill weave:

Answer 5

Diagonal lines give twill weaves a distinctive look. It’s achieved when the warp (or weft) passes over 2 or more weft (or warp) yarns before interlacing (floats). Interlacement is progressive, not alternating, and the progression of 1 gives the visible diagonal structure on twill weave fabrics.

Question 6

Warp-faced twill:

Answer 6

More warp yarns are visible on the face of the fabric (e.g., 2/1 or 3/1 twill).

Question 7

Weft-faced twill:

Answer 7

When there are more weft yarns visible on the face of the fabric (e.g., 1/2 or 1/3 twill).

Question 8

Balanced (even) twill:

Answer 8

When equal amount of warp and weft yarns are visible on the fabric face (2/2 twill weave).

Question 9

Right-hand or left-hand twill:

Answer 9

This describes the slope of the interlacements.

Question 10

What kind of twill weave is denim?

Answer 10

The face of denim is a right-hand, warp faced 3/1 twill. The back has a reversed diagonal.

Question 11

How can twill direction reverse?

Answer 11

Twill waves can be varied so that the direction reversées, as in herringbone fabric and diamond twills.

Question 12

What is the Houndstooth check?

Answer 12

A variation of twill weave where the colour of yarn is varied.

Question 13

Satin weaves:

Answer 13

When the warp passes over 4 or more weft yarns before interlacing under 1 (floats). The interlacement is progressive (similar to twill) but progression is always 2 or more. A visible diagonal is not present on satin weave fabrics. They have a smooth, lustrous surface, created by long floating yarns. Filament yarns are frequently used for satin fabrics, and the fabric is always unbalanced.

Question 14

Warp-faced satin weave:

Answer 14

More warp yarns visible on the face of the fabric (e.g., 4/1 (2) or 5/1 (3) satin).

Question 15

Weft-faced satin weave:

Answer 15

When there are more weft yarns visible on the face of the fabric (e.g., 1/4 (2) or 1/5 (2) satin).

Question 16

Sateen:

Answer 16

A term often used for cotton/staple yarns.

Question 17

Complex weaves:

Answer 17

To make more complex woven fabrics, additional sets of yarns are needed – it may have two or more sets of warp and/or weft yarns (double weave, pile weaves). The pattern of interlacing is also more complex than for the basic weaves (e.g., dobby weave, damask, tapestry) and looms required to control the yarns are more complex than required for basic weaves.

Question 18

Dwelt is similar about double and pile weaves?

Answer 18

They are both a complex weave made with an extra set of yarns.

Question 19

What makes a Dobby weave complex?

Answer 19

It has complex interlacing.

Question 20

What makes a jacquard weave complex?

Answer 20

It has complex interlacing and an extra set of yarns.