Chapter 8 Dyeing

Question 1

dyes

Answer 1

Treatment of textile material in water solution. Textile treated in aqueous solutions and dyestuffs

Question 2

Pigments

Answer 2

insoluble colored particles made to adhere to a fabric.

Question 3

Conventional, or Aqueous, Dyeing

Answer 3

(1)Dye molecules adhere to fiber
(2) Penetrate fiber
(3) Migrate in the fiber
(4) Fiber is completely dyed

Question 4

Dyeing

Answer 4

dyestuffs react and combine with in a water solution

Question 5

*Depth of shade

Answer 5

darkness or lightness of colour

Question 6

*Substrate

Answer 6

ratio of the weight of fiber to quantity of dye

Question 7

dye classes

Answer 7

dyes are grouped by color fastness characteristics and by those applied with similar techniques

Question 8

Affinity

Answer 8

dye capable of combining with a particular fiber

Question 9

Dye classes

Answer 9

dyes are grouped by color fastness characteristics and by those applied with similar techniques

Question 10

lab dip

Answer 10

sample swatch of finished dyeing

Question 11

*Standard:

Answer 11

future orders must conform

Question 12

Dye lot

Answer 12

new batch

Question 13

*Computer-management systems:

Answer 13

color and shade matching systems

Question 14

*Color-management systems:

Answer 14

aids in maintaining high color standard and lot-to-lot shade consistency

Question 15

*Spectrophotometer

Answer 15

instrument measures percent of reflected light in visible spectrum

Question 16

*Metamerism

Answer 16

two colors match under one light condition but look different in another light

Question 17

Color flare

Answer 17

change in color of fabric because of a change in light source

Question 18

Color-matching booth

Answer 18

box-type device used to test for metamerism

Question 19

Macbeth Lamp

Answer 19

name of original Color-matching booths

Question 20

Fiber Dyeing

Answer 20

Process of Dyeing Fibers prior to spinning to yarns
Dye penetration is excellent
High amount of dye is used
Costlier than yarn, fabric and product dyeing
Process is not suitable for quick reponse

Question 21

Stock Dyeing

Answer 21

dyeing fibers before it is spun into yarn

Question 22

Top Dyeing

Answer 22

dyeing fiber before it is spun into yarn to produce heather colors
Top – fibers of wool from which shorter fibers have been removed

Question 23

forms of yarn dyeing

Answer 23

yarn, skein, package, beam

Question 24

form of stock dyeing

Answer 24

Top dyeing

Question 25

Yarn Dyeing

Answer 25

dyeing of yarns before they are woven or knitted Provide adequate color absorption and penetration

Question 26

Skein Dyeing

Answer 26

immersing skeins (loosely wound hanks) into dye vats

Question 27

*Package Dyeing

Answer 27

yarn wound on small perforated spool (package) *Flow of dye bath alternates direction

Question 28

Beam Dyeing

Answer 28

entire warp beam wound onto perforated cylinder to go in beam-dyeing machine. Larger version of package dyeing

Question 29

fabric piece dyeing

Answer 29

jet, jig, pad, beam, continuous dying and continuous dye system

Question 30

Piece Dyeing

Answer 30

dyeing cloth after it is woven or knitted Very economical Most common method of dyeing solid colors Process is suitable for quick response

Question 31

Jet Dyeing

Answer 31

fabric is circulated in rope form on jet flow of the dye bath

Question 32

Jig Dyeing

Answer 32

fabric is passed through a stationary dye bath (not immersed in the dye bath)

Question 33

Pad Dyeing

Answer 33

fabric passes through dye bath and then through rollers where dye solution is squeezed into it

Question 34

Continuous dye system

Answer 34

large quantities of fabric run continuously

Question 35

Beam dyeing

Answer 35

fabric wound onto perforated cylinder, then dye bath is forced through the stationary fabric layers

Question 36

Continuous Dyeing

Answer 36

fabric travels through dyeing process without stopping

Question 37

product dyeing

Answer 37

Garment dyeing

Question 38

*Garment Dyeing

Answer 38

dyeing of completed garments such as hosiery, T shirt, sweaters etc Ideal for quick response Not suitable for apparel with many components

Question 39

special dying effects

Answer 39

cross dyeing, Union dyeing, tone-on-tone effects

Question 40

cross- dyeing

Answer 40

fabric of two fiber types having different dye affinities is dyed in a single bath of different dyes classes *Produces multicolor effects Method of dyeing blend or combination fabrics to two or more shades Uses dyes with different affinities for different fibers.

Question 41

union dyeing

Answer 41

two classes of dye in same color to produce one color Method of dyeing a fabric containing two or more type of fibers or yarns to the same shade so as to achieve the appearance of the solid colored fabric Used to dye solid colored blends and combination fabrics

Question 42

tone-on-tone effects

Answer 42

one dye bath to produce different tones in fabric by using fibers with different affinity

Question 43

Pigment Coloring

Answer 43

insoluble in water and do not combine with the textile fiber

Question 44

solution dyeing

Answer 44

part of the manufacturing process *Coloring agent is added to liquid spinning solution before fiber is extruded from a spinnerette

Question 45

benifits of solution dyeing

Answer 45

Excellent color fastness More expensive Used for difficult to dye manufactured fibers such as olefin Environmental friendly process

Question 46

Colorfastness

Answer 46

ability of dyed or printed textile to resist color loss or fading