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Reactive Dyes in Textile Dyeing and Finishing

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Reactive Dyes in Textile Dyeing and Finishing

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Questions and Answers

What is a reactive dye?

A dye that is only available in liquid form

A dye that is only used for dyeing cellulose fibers

A dye that has poor light fastness

A dye that reacts chemically with a substrate to form a covalent dye-substrate linkage (correct)

What type of dyes are reactive dyes?

Cationic dyes used for dyeing cellulose, protein, and polyamide fibers (correct)

Anionic dyes used for synthetic fibers

Basic dyes used for polyester fibers

Azoic dyes used for natural fibers

What is the reason for the good wash fastness of textile materials dyed with reactive dyes?

Strong covalent bonds formed between fiber polymer and reactive group of dye (correct)

Weak bonds formed between fiber polymer and reactive group of dye

Low solubility of reactive dyes in water

Use of high temperatures during dyeing process

What type of shades does reactive dye produce?

Bright shades of wide range Signup and view all the answers

What is a property of reactive dyes that makes the dyeing method easy?

Requires less time and low temperature for dyeing Signup and view all the answers

What characterizes a reactive dye?

It has a reactive group that forms a covalent bond with the fiber polymer Signup and view all the answers

In which form are reactive dyes found?

Print paste form Signup and view all the answers

What factor contributes to the good wash fastness of textiles dyed with reactive dyes?

Covalent bonds formed between the fiber polymer and the reactive group of the dye Signup and view all the answers

Which type of fibers are colored using reactive dyes?

Cellulose, protein, and polyamide fibers Signup and view all the answers

What contributes to the popularity of reactive dyes?

Ability to produce bright shades of wide range Signup and view all the answers

Reactive dyes are the only type of dyes that contain a reactive group capable of forming a covalent bond with fiber polymer molecules.

True Signup and view all the answers

Reactive dyes are anionic dyes.

False Signup and view all the answers

Textile materials dyed with reactive dyes have very good light fastness with a rating of about 4-5.

False Signup and view all the answers

Reactive dyes are not soluble in water.

False Signup and view all the answers

The dyeing method of reactive dyes requires high temperature and a long time for dyeing.

False Signup and view all the answers

Reactive Dyes in Textile Dyeing and Finishing

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Podcast

Questions and Answers

What is a reactive dye?

What type of dyes are reactive dyes?

What is the reason for the good wash fastness of textile materials dyed with reactive dyes?

What type of shades does reactive dye produce?

What is a property of reactive dyes that makes the dyeing method easy?

What characterizes a reactive dye?

In which form are reactive dyes found?

What factor contributes to the good wash fastness of textiles dyed with reactive dyes?

Which type of fibers are colored using reactive dyes?

What contributes to the popularity of reactive dyes?

Reactive dyes are the only type of dyes that contain a reactive group capable of forming a covalent bond with fiber polymer molecules.

Reactive dyes are anionic dyes.

Textile materials dyed with reactive dyes have very good light fastness with a rating of about 4-5.

Reactive dyes are not soluble in water.

The dyeing method of reactive dyes requires high temperature and a long time for dyeing.

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