Textiles

What are cellulose fibres derived from?

They come from plant materials such as cotton, linen, hemp, and rayon.

What are examples of protein fibres?

Wool and silk.

What are manufactured fibres?

Man-made fibres that include acrylic, viscose, and nylon.

What is the difference between tints and shades?

Tints are colors mixed with white, while shades are colors mixed with black.

What are the primary colours?

Red, blue, and yellow.

What are secondary colours?

Orange, violet, and green.

What constitutes a tertiary colour?

Colors that are in between primary and secondary colors, like yellow-green, blue-violet, or orange-red.

What does 'hue' refer to in color terms?

Hue refers to the color family.

What is the definition of value in color theory?

Value refers to lightness or darkness.

What does saturation mean in terms of color?

Saturation refers to the brightness or intensity of a color.

What are direct dyes used for?

They dye cellulose fibres and are not as washfast as other dyes.

Name two brands of direct dyes.

Aljo cotton & Rayon and iDye Natural.

What are natural dyes?

Natural dyes are not chemically derived and are used to dye natural fibres.

What do acid dyes dye?

They dye protein fibres.

Give two brands of acid dyes.

Ciba Acid dyes and Aljo Batik silk and wool dye.

What are union dyes?

Union dyes are a mixture of acid, direct, and sometimes disperse dyes.

Name two brands of union dyes.

Dylon and Rit.

What fibres do disperse dyes dye?

Disperse dyes dye synthetic fibres.

List two brands of disperse dyes.

Rit DyeMore and iDye Poly.

Where can you buy Dylon dyes?

N.K. Jeffersons or Gwartzmans in Toronto.

What is the warp?

The warp goes up and down.

What does the weft do in weaving?

The weft goes side to side.

What is meant by 'discharge' in dyeing?

To take color away.

what effect does bleach have on protein fibres?

it destroys silk and damages wool

What is needed to neutralize bleach after its use?

A bleach neutralizer like sodium metabisulphite or ascorbic acid mixed with water.

What is sodium hydrosulphite used for?

It is used as a discharge agent and is available from dye suppliers.

What does potassium permanganate do and how is it used?

It removes indigo specifically and must be diluted in water.

Where can potassium permanganate be purchased?

At Xnex labs with a specific letter from the production company.