Tod viva 2

Thermo fixation process works due to ________ property of disperse dye.

• Dissolving at high temperature

• Dispersion

• Sublimation

• All the above

Singeing of polyester fabric is done _______.

• Always before dyeing

• Always after dyeing

• Any time of the dyeing

• None of the above

Migration of dye in Thermo fixation process can be avoided by -

• Using lower water in the bath.

• Using acetic acid in the bath.

• Using sodium alginate in the bath.

• Using dispersing agent in the bath.

Thermo fixation process is

• Pad - Dry - Cure.

• Pad - Dry - Steam.

• Pad - Dry - Pad - Cure.

• None of the above

Dyeing cycle is shorter for jet dyeing machine than beam dyeing machine.

• True

• False

Gradual rise in temperature for Thermo fixation process is for -

• Diffusion of dye.

• Fixation of dye.

• Avoid tailing effect.

• Avoid migration.

Perforation mark is a problem in fabric in jet dyeing is always in

• Jet dyeing machine

• Beam dyeing machine

• Thermo-fixation

• All the above

Beam dyeing machine works with lower M:L ratio than jet dyeing machine

• True

• False

Reduction clearing of polyester fabric is done for

• Increasing brightness of fabric

• Increasing fastness of the fabric

• Increasing weight of the fabric

• Increasing depth of dyed shade

Reduction clearing of polyester is done with

• Sodium hydroxide and sodium hydrosulphite

• Sodium hydroxide and sodium sulphide

• Sodium carbonate and sodium hydrosulphite

• Sodium carbonate and sodium sulphide