Fabric Analysis Chapter 2: Dyes and Dyeing

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What does it mean for a color to be considered 'permanent'?

It will not shift color when moisture lifts and deposits it

It will not transfer color due to abrasion

It will not lose color in water (correct)

It will not fade due to atmospheric fumes

Which of the following best describes 'bleeding' in the context of fabrics?

Color loss due to atmospheric fumes and dry cleaning chemicals

Localised color loss due to abrasion during wear

Shift of color due to moisture lifting and redepositing it in another area

Color loss and staining caused by the transfer of color in water (correct)

What is 'crock' in the context of fabric analysis?

Loss of color due to atmospheric fumes and detergents

Localised color loss due to abrasion during wear

Shift of color that occurs when moisture lifts and deposits it in another area

Transfer of color due to abrasion or rubbing (correct)

Why are synthetic dyes used commercially instead of natural dyes?

They have better color fastness than natural dyes Signup and view all the answers

What is the main difference between dyes and pigments?

Dyes chemically bond with the fiber, while pigments require a resin binder to adhere to fabric. Signup and view all the answers

What is a disadvantage of stock dyeing or fibre dyeing?

Early color decisions have to be made, and it is relatively expensive. Signup and view all the answers

What is the advantage of yarn dyeing?

Good dye penetration can be achieved in this process. Signup and view all the answers

What is an advantage of using pigments instead of dyes?

They are cheaper and more efficient to apply than dyes. Signup and view all the answers

What must be done to make the color from dyes permanent?

The colored fabric must undergo curing or heating. Signup and view all the answers

What makes stock dyeing or fibre dyeing relatively expensive?

Early color decisions have to be made in production. Signup and view all the answers

What is the main disadvantage of using stock dyeing or fibre dyeing?

Limited color decisions are made early in production Signup and view all the answers

How are pigments different from dyes?

Pigments require a resin binder to adhere to fabric, while dyes do not Signup and view all the answers

Why is yarn dyeing advantageous in the production process?

Provides an opportunity for special space dyeing techniques Signup and view all the answers

What is a notable characteristic of pigments when compared to dyes?

Pigments do not affect the texture of the fabric Signup and view all the answers

What is a key drawback of solution dyeing, particularly for manufactured fibers?

Inability to obtain a color match due to early color decision Signup and view all the answers

Which term describes the shift of color that occurs when moisture lifts color and redeposits it in another area?

Migrate Signup and view all the answers

What is the term for the loss of color due to atmospheric fumes, detergents, chlorine bleaches, dry cleaning chemicals, laundering, and sunlight?

Fade Signup and view all the answers

What term is used to describe the transfer of color due to abrasion or rubbing?

Crock Signup and view all the answers

Which type of dye was the only available option until the mid-1800s?

Natural dyes Signup and view all the answers

What is the term for colourants that are chemicals producing color and are used to add color to textiles?

Dyes and pigments Signup and view all the answers