Quiz 3 Power Points Flashcards
(122 cards)
1
Q
how many colors can the human eye see
A
22 million
2
Q
how many color receptors does the eye have
A
3 (red, blue, greeen)
3
Q
is the perceiving color unique or the same per human
A
unique
4
Q
what are different categories of color perception can you have
A
color normal and color blind
5
Q
How can textile fabrics alter their perceived color
A
through the structure
6
Q
What do color depend on
A
nature of incident light and the interaction with object
7
Q
Light striking can be…
A
reflected, absorbed, and transmitted
8
Q
What color causes all light to be absorbed
A
black
9
Q
What are colors mixtures of
A
monochromatic light of varying wavelengths
10
Q
When visible light strikes fabric, what is absorbed
A
every other color but the color of the fabric
11
Q
What are factors influencing color
A
- Light source
- Age
- Gender
- Fatigue
- Texture
12
Q
What does RGB Stand for
A
Red, green, blue
13
Q
What color mixing property is used by a computer monitor
A
RGB
14
Q
If you increase the intensity of RGB, what color does it make
A
White
15
Q
What does CMY Stand for
A
Cyan, Magenta, Yellow
16
Q
If you increase the intensity of CMY, what color does it make
A
17
Q
What does Hue mean
A
color sensation
18
Q
What does Value mean
A
lightness or darkness
19
Q
What does Chroma (saturation) mean
A
purity of color
20
Q
What color remains constant no matter what light source hits it
A
white
21
Q
Color Difference
A
The smallest difference in color that a normal observer can see
22
Q
What colors are harder to see small differences
A
deep red or deep violet
23
Q
What colors are easier to see small differences
A
green or yellow
24
Q
what light intensity is hard to see small differences
A
very bright and very dark
25
Hoe to minimize color differences
standardized, light sources, viewing angles, and viewing boxes
26
Dyeing
Process of adding color to textile materials - Absorbs
27
Printing
Localized application of colorants to produce patterned areas - May stay on surface OR Diffuse
28
How can dyes be applied
fiber, yarn, or garment form
29
What are the compounds for adding color to textile materials
dyes or pigments
30
components of dyeing
- HIGH water solubility
- ORGANIC compounds
- CANNOT be dyed the same
- DIFFUSED into fibers
- Costly
- NO binding agent
31
components of pigment printing
- water INSOLUABLE
- INORGANIC
- CAN be printed the same
- DONT diffuse
- Cheap
- YES binding agent
32
What do you have to do before dyeing and printing
prepare
33
Bleaching
Removing color impurities
33
Scouring
Removing dirt
33
What does bleaching do to luster
makes it brighter
34
What does bleaching do to the color of fabric
makes it whiter
35
half bleach
partial whitening
35
What types of bleaching can you use
half and full bleaching
36
full bleach
as much whitening as possible
37
Factors that influence dyeing
- Liquor Ratio
- Fiber character
- Macheine
- temp
- dye concentration
38
liquor ratio formula
LR = amount of water (L) / weight of fabric (kg)
39
What does liquor ratio affect
dye uniformity, environmental and energy usage
40
what liquor ratio is best for dye uniformity
Higher LR
41
What liquor ratio is best for environmental and energy usage
lower LR
42
What is the difference between dyeing VS Staining
Dyeing - Intentional and Permanent
Staining - Accidental or Intentional, temportary
43
The different stages of dyeing
- Solution
- Fiber
- Yarn
- Fabric
- Product
44
Solution Dyeing
dyeing manufactured fibers and are used for fibers that are difficult to dye
45
Tow Dyeing
dyeing fibers before they are cut
46
Yarn Dyeing
Adds color at yarn stage
47
Skein Dyeing
yarns loosley wound to hanks or skeins and then dyed
48
Package Dyeing
yarns wound on perforated spools and dyed in pressurized tank
49
space dyeing
skeins of yarns dyed in multiple colors
50
Fabric/Peice Dyeing
Entire peice (bolt or roll) of fabric
51
Union Dyeing
two different fibers to the same shade
52
cross dyeing
two different fibers to not the same shade
53
Batch dyeing techniques
jig, jet, beck
54
what is continuous dying used for
used for large batches
55
Jig dyeing
holds the fabric in open width within the dye bath
56
Beck dyeing
fabric is propelled by rotating elliptical roller or reel
57
jet dyeing
fabric is propelled
58
Dyeing vs. Printing
Dyeing - application of color
Printing - A selective application of color
59
Textile Printing
application of dye pastes, pigments, or other chemicals to produce designs on textile products
60
how prints/printed fabrics can be classified
- colorant
- type of motif
- type of print
- printing technique
61
fabric printing objectives
- Registration
- Calrity
- Penetration
- Fastness
62
Wha are dyes used for
dyeing and printing
63
wet prints
prints with dyes
64
dry prints
prints with pigment
65
Dyes vs. pigments:
Dyes:
- penetrates
- doesn't affect fabric hand
- no cracks
- effective to bleach
pigments:
- doesnt penetrate
- stiff
- cracks
- not effected by bleach
66
Blotch prints
colored background where the background and pattern are printed at the same time
67
Over prints
pattern printed on previously dyed fabric
68
Mechanized Printing methods
Stencil, direct, heat transfer
69
automatic flat screen printing
used for large repeats, slow, t-shirts
70
rotary screen
half of printed goods, cheap, fast
71
heat transfer printing
transfer pattern from paper to fabric
- slow, high quality, pollution free, short runs
72
Hand printing methods
Direct, resist, stencil
73
hand printing
mechanized methods used to imitate hand-printed methods
74
tie dye
you tie and then dye materials
75
Ikat
tiedyed prior to weaving
76
Batik
wax is applied o fabric to prevent dye penetration
77
flat and flatbed screens
small flat screens that are used to print small areas like tshirts
78
Digital printing
direct printing onto fabric via an ink jet printer
79
what is a disadvantage for digital printing
slow for production
80
finishing
treatment of fabric to prepare it for sale
81
type of finish
chemical, mechanical, thermal,
82
finishes are categorized on
type of finish, purpose for applying the finish, durability of the finish
83
purpose for applying the finish
aesthetic and functional
84
permanent finish
lasts for the life of the fabric
85
durable finish
the effectiveness of the finish is GRADUALY reduced
86
semi-durable finish
loses its effectiveness after repeated use
87
temporary finish
partially or completely removed after ONE laundering or cleaning
88
Aesthetic finishings affect
luster, texture, hand, color
89
Aesthetic finishes can be broken into what categories
chemical, mechanical, thermal
90
Aesthetic finishes - Burn Out
sheer area with fringe around the edge of the sections where the chemical was applied
91
What does burnout require
a combination of yarn or fabrics
- one is resistant to chemical
one is dissolved by acid
92
Aesthetic finishes - Plisse
Produced by applying a chemical in vertical STRIPES that shrink those ears of the material
93
Aesthetic finishes - SCHREINERING
Heated engraved roll presses fine lines into cotton or linen fabric to increase luster
94
Aesthetic finishes - Embossing
Creates a raised effect that is produced by passing the fabric with an etched roller and a solf roller
95
Aesthetic finishes - MOIRE
produced by passing two layers of a rib weave fabric between rollers to FLATTEN the ribs in certain areas
96
Aestheic finishes - Glazed Finish
rollers ADD LUSTER by flattening the surface of the fabric
97
Heat Setting
establishes fabric memory, minimizing shrinkage, piling, and wrinkling
98
Decatizing
circulating hot water or blowing steam through fabrics to improve hand and remove wrinkles
99
Thermal
Heat setting fabrics made of thermoplastic fibers
100
Resin
permanent creases in fabrics
101
Singeing
exposing fabric surface to a flame
102
napping
a mechanical finishing process that raises fibers with the use of wires
103
shearing
cutting loops of yarn to create a flat velvet fabric appearance and look
104
Aesthetic finishes that alter hand
Sueding, Sanding, Stiffening
105
Aesthetic finishes that alter color
stone washing sand washing, mercerizing, chemical washing
106
Functional finishes
finishes that enhance fabric performance
107
functional finishes enhance
comfort, maintenance, safety, durability
108
Durable Press
a garment that has been treated to maintain a smooth shape and appearnce
109
Water proof
prevents penetration of water
110
water resistant
resists penetration of water
111
water repellent
water tends to be shed but can pass through the fabric
112
ovens
fabric edges held by pins or clips
113
Heated cans
used to dry woven fabrics
114
tenter frames
chains with pins or clips that pull width of fabric open as it passes through an oven
115
Compacting
forces fabric to compress upon itself
116
Resin
a polymer or prepolymer applied to fabric to prevent creasing, shrinkage, ironing
117
hand building
used in lace and denim to add weight and increase luster
118
softeners improve what
hand, tear, abrasion resistance, sewing behavior, appearance
119
softeners cause what (disadvantages)
color change, less durable, odors
