Chemical Finishes

Question 1

What is bleaching?
1- :) 2 - :(

Answer 1

chemicals are used to remove natural colour from cotton/linen - prepares fabric for dyeing and printing
:) lighter shade - printing is clearer
:( can weaken fabric, lots of energy/water used

Question 2

What is easy care?
:( -2

Answer 2

resin is applied to fabric - stiffens it and reduces creasing/shrinkage
:( eventually washes out, absorbency is reduced

Question 3

What is mercerising?
:) :(

Answer 3

cotton fabric is soaked in sodium hydroxide/ caustic soda to strengthen the fabric (makes cellulosic fibres swell)
:) leaves a lustrous and stronger fabric
:(adds cost

Question 4

What is carbonising?
:) :(

Answer 4

acid removes impurities from newly woven fabric
:) holds dye better after
:( uses sulphuric acid: needs careful storage/disposal otherwise it harms environment

Question 5

What is fire proofing?
:)
:( 2

Answer 5

flame resistant chemicals are applied to yarn or fabric
:) reduces ability to ignite and burn
:( stiffens fabric, needs careful washing

Question 6

What is stain resistance?
!!!

Answer 6

silicon or resin sprayed onto fabric’s surface to repel stains
!!! also used for water repellence to reduce absorbency

Question 7

What is anti static?

Answer 7

chemical based product is applied to prevent build up of static electricity
:) reduces conductivity and increases moisture content: improve finish & feel
:( eventually washes out