Section3:Project on using natural dyes to colour fabrics 纠错
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Part A :

Question 21 - 24

Choose the correct letter, A , B or C .

21 What first inspired Jim to choose this project?

atextiles displayed in an exhibition

ba book about a botanic garden

ccarpets he saw on holiday

显示答案 正确答案: C

22 Jim eventually decided to do a practical investigation which involved

ausing a range of dyes with different fibres.

bapplying different dyes to one type of fibre.

ctesting one dye and a range of fibres.

显示答案 正确答案: A

23 When doing his experiments, Jim was surprised by

ahow much natural material was needed to make the dye.

bthe fact that dyes were widely available on the internet.

cthe time that he had to leave the fabric in the dye.

显示答案 正确答案: A

24 What problem did Jim have with using tartrazine as a fabric dye?

aIt caused a slight allergic reaction.

bIt was not a permanent dye on cotton.

cIt was ineffective when used on nylon.

显示答案 正确答案: B

What problem is identified with each of the following natural dyes?

Choose SIX answers from the box and write the correct letter, A-H , next to Questions 25-30

Possible reasons

25 25 turmeric

26 26 beetroot

27 27 Tyrian purple

28 28 logwood

29 29 cochineal

30 30 metal oxide

a It is expensive.

b The colour is too strong.

c The colour is not long-lasting.

d It is very poisonous.

e It can damage the fabric.

f The colour may be unexpected.

g It is unsuitable for some fabrics.

h It is not generally available.

显示答案 正确答案: 25 c 26 f 27 h 28 d 29 a 30 e

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Project on using natural dyes to colour fabrics

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