SECTION 3
Questions 21 – 24
Choose the correct letter, A, B or C.
Project on using natural dyes to lớn colour fabrics
21 What first inspired Jim to lớn choose this project?
A textiles displayed in an exhibition
B a book about a botanic garden
C carpets he saw on holiday
22 Jim eventually decided to lớn bởi a practical investigation which involved
A using a range of dyes with different fibres.
B applying different dyes to lớn one type of fibre.
C testing one dye and a range of fibres.
23 When doing his experiments, Jim was surprised by
A how much natural material was needed to lớn make the dye.
B the fact that dyes were widely available on the mạng internet.
C the time that he had to lớn leave the fabric in the dye.
24 What problem did Jim have with using tartrazine as a fabric dye?
A It caused a slight allergic reaction.
B It was not a permanent dye on cốt tông.
C It was ineffective when used on nylon.
Questions 25 – 30
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 lớn Questions 25-30
Problems
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
Natural dyes
25 turmeric ……………
26 beetroot ……………
27 Tyrian purple ……………
28 logwood ……………
29 cochineal ……………
30 metal oxide ……………