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fabric science > Chapter 8 Dyeing > Flashcards

Chapter 8 Dyeing Flashcards

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1
Q

dyes

A

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

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2
Q

Pigments

A

insoluble colored particles made to adhere to a fabric.

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3
Q

Conventional, or Aqueous, Dyeing

A

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

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4
Q

Dyeing

A

dyestuffs react and combine with in a water solution

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5
Q

*Depth of shade

A

darkness or lightness of colour

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6
Q

*Substrate

A

ratio of the weight of fiber to quantity of dye

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7
Q

dye classes

A

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

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8
Q

Affinity

A

dye capable of combining with a particular fiber

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9
Q

Dye classes

A

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

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10
Q

lab dip

A

sample swatch of finished dyeing

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11
Q

*Standard:

A

future orders must conform

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12
Q

Dye lot

A

new batch

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13
Q

*Computer-management systems:

A

color and shade matching systems

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14
Q

*Color-management systems:

A

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

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15
Q

*Spectrophotometer

A

instrument measures percent of reflected light in visible spectrum

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16
Q

*Metamerism

A

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

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17
Q

Color flare

A

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

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18
Q

Color-matching booth

A

box-type device used to test for metamerism

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19
Q

Macbeth Lamp

A

name of original Color-matching booths

20
Q

Fiber Dyeing

A

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

21
Q

Stock Dyeing

A

dyeing fibers before it is spun into yarn

22
Q

Top Dyeing

A

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

23
Q

forms of yarn dyeing

A

yarn, skein, package, beam

24
Q

form of stock dyeing

A

Top dyeing

25
Q

Yarn Dyeing

A

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

26
Q

Skein Dyeing

A

immersing skeins (loosely wound hanks) into dye vats

27
Q

*Package Dyeing

A

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

28
Q

Beam Dyeing

A

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

29
Q

fabric piece dyeing

A

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

30
Q

Piece Dyeing

A

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

31
Q

Jet Dyeing

A

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

32
Q

Jig Dyeing

A

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

33
Q

Pad Dyeing

A

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

34
Q

Continuous dye system

A

large quantities of fabric run continuously

35
Q

Beam dyeing

A

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

36
Q

Continuous Dyeing

A

fabric travels through dyeing process without stopping

37
Q

product dyeing

A

Garment dyeing

38
Q

*Garment Dyeing

A

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

39
Q

special dying effects

A

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

40
Q

cross- dyeing

A

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.

41
Q

union dyeing

A

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

42
Q

tone-on-tone effects

A

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

43
Q

Pigment Coloring

A

insoluble in water and do not combine with the textile fiber

44
Q

solution dyeing

A

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

45
Q

benifits of solution dyeing

A

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

46
Q

Colorfastness

A

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

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