printing and dyeing techniques:

Question 1

what is hand dyeing?

Answer 1

when the fabrics are immersed in hot or cold water in a dye bath by hand- then the fabric is removed from the dye and rinsed to remove excess dye. then it is dried.

Question 2

what are hand dyed fabrics fixed with?

Answer 2

mordant or a fixing agent like salt

Question 3

what is the strength of dye determined on?

Answer 3

-amount of time in the dye bath
-absorbency of the fibres
-original fabric colour
-concentration of the dye
-effective use of mordant or fixative

Question 4

before colour can be applied to a fabric what needs to happen?

Answer 4

the fabric needs to be cleaned to remove natural impurities and dirt and oil picked up from the machines during manufacturing. otherwise the colour will not attach itself to the fabric

Question 5

what is dyeing?

Answer 5

the permanent application of colour to a fibre or fabric to give a uniform colour.

Question 6

what is colour fastening?

Answer 6

the strength in which the dye is held inside the fibre

Question 7

what is spin dyeing?

Answer 7

the dye is put into the spinning solution of synthetic fibres

Question 8

what is stock dyeing ?

Answer 8

fibres are dyed before being spun into yarn

Question 9

what is yarn dyeing?

Answer 9

yarns are dyed before being made into fabric

Question 10

what is piece dyeing?

Answer 10

the dyeing of fabrics

Question 11

what is garment dyeing?

Answer 11

made-up garments are dyed according to demand for different colours.

Question 12

what is tie-dye?

Answer 12

fabric being folded or twisted then tied to stop dye reaching some parts of the fabric

Question 13

what is batch dyeing?

Answer 13

fabrics are dyed to order in large batches

Question 14

what is batch dyeing used for?

Answer 14

fabrics that have to change colour frequently because of fashion

Question 15

what are the benefits of rotary screen printing?

Answer 15

-it’s a very fast process which is used in continious printing

Question 16

what is screen printing?

Answer 16

a pattern is printed onto a fabric using a stencil held in place by a screen. each screen prints one part of the design

Question 17

after applying the printing dye from screen printing what do you need to do?

Answer 17

fix the design into place using steam or dry heat

Question 18

what are the three advantages of printing?

Answer 18

-there are more opportunities for designing
-more colours can be used
-complex designs can be produced

Question 19

what are the 4 main types of fabric printing?

Answer 19

-screen printing
-roller print
-sublimation print
-digital print

Question 20

what is roller print?

Answer 20

engraved copper rollers that are full width of the fabric are coated with printing paste and rolled over the fabric

Question 21

what is sublimation print?

Answer 21

the design is printed onto a special paper and transferred to fabric using a heat press. the heat turns the dye into a vapour which is transferred to the fabric

Question 22

what fabric does sublimation print work best on?

Answer 22

polyester or other fabrics made from synthetic fibres

Question 23

what is digital print?

Answer 23

a pattern is designed on a computer then printed straight onto the fabric. the colour is fixed in the fabric using steam.

Question 24

what is digital printing only suitable for?

Answer 24

small amounts of fabric

Question 25

what things must be taken care of when screen printing?

Answer 25

-print must be the correct size and placed accurately on the product
-colour is even and not smudged
-need to be careful as the print is repeated, small mistakes can quickly become large errors along the length or width of the fabric

Question 26

what is tie dye also known as?

Answer 26

resist dyeing

Question 27

what is resist dyeing?

Answer 27

resisting the fabric by tying it off which stops the dye penetrating certain areas of the fabric to produce a pattern

Question 28

what is batik?

Answer 28

hot wax or flour paste is used to draw pattern onto a fabric before it is dyed- it can prevent dye from reaching some parts of the fabric

Question 29

what is batik also known as?

Answer 29

resist dyeing