TOD-II Viva 4

Anionic retarders in acrylic dyeing bath with basic dye are used for

• Competition with the dye for the dye sites on the fibre.

• Forming a complex with dye.

• Adsorbing on the fibre surface in the initial stages of dyeing.

• None of the above.

Acrylic fibre can dye with

• Diperse

• Basic

• Both

• None of the option

The nature of Polymeric retarding agent is

• Toxic

• Non-biodegradable

• Both of the above

• None of the above

The amount of cationic retarder depends on

• Type of the fiber

• Dye concentration

• Method of dyeing

• All the above

It is advisable to use ________ agent with an anionic retarding agent in basic dyeing bath for avoiding staining of machine and material.

• Leveling

• Swelling

• Dispersing

• Buffering

The anionic retarders in acrylic dyeing are mostly suitable for

• Low dye concentration mixtures.

• Compatible mixtures.

• Incompatible mixtures.

• High concentration mixtures.

Polymeric retarders in acrylic dyeing bath with basic dye are used for

• Competition with the dye for the dye sites on the fibre.

• Forming a complex with dye.

• Adsorbing on the fibre surface in the initial stages of dyeing.

• None of the above.

Cationic retarders in acrylic dyeing bath with basic dye are used for

• Competition with the dye for the dye sites on the fibre.

• Forming a complex with dye.

• Adsorbing on the fibre surface in the initial stages of dyeing.

• None of the above.

The main drawback of cationic retarders is

• Decolorize some dye in bath during dyeing.

• Permanent blocking of some fiber sites.

• Dulling of basic dye after dyeing.

• None of the above.

The amount of cationic retarder decreases with

• Increase in dye concentration.

• Decrease in dye concentration.

• Increase in temperature.

• Decrease in temperature.