Table 3 The surface pH, breaking load, and extension of the unaged substitute textiles and iron-tannate dyed museum objects

Wool undyed (WU)

7.46 (0.49)^a

ND^b

ND^b

Wool dyed with p1 (Wp1)

3.91 (0.10)

ND

ND

Wool dyed with p2 (Wp2)

3.84 (0.11)

ND

ND

Silk undyed (SU)

7.24 (0.09)

70.2 (4.9)

28.2 (1.7)

Silk dyed with p1 (Sp1)

3.60 (0.06)

62.9 (4.9)

25.0 (2.6)

Silk dyed with p2 (Sp2)

3.69 (0.09)

56.4 (2.5)

22.9 (1.7)

Silk dyed with p3 (Sp3)

3.57 (0.06)

55.3 (3.8)

22.6 (1.6)

Abaca undyed (AU)

5.36 (0.18)

239.9 (43.1)

3.9 (0.5)

Abaca dyed with c1 (Ac1)

2.86 (0.07)

105.9 (18.3)

2.1 (0.3)

Abaca dyed with c2 (Ac2)

2.67 (0.08)

130.1 (24.8)

2.5 (0.5)

Cotton undyed (CU)

6.61 (0.11)

73.2 (7.7)

10.5 (1.1)

Cotton dyed with c1 (Cc1)

2.72 (0.06)

68.3 (5.3)

6.9 (0.7)

Cotton dyed with c2 (Cc2)

2.65 (0.07)

51.0 (4.8)

9.2 (1.3)

Cotton dyed with c3 (Cc3)

2.48 (0.04)

45.7 (8.6)

10.2 (1.9)

Dyed areas of modern piu piu owned     by Dr Vincent Daniels (Figure 2)

3.72 (0.28)

ND

ND

Black fibres of broken Maori cloak and piu piu     from the Horniman Museum (Figure 3)

2.89 (0.19)

ND

ND

Black cotton Akali Sikh turban (2005,7-27.1^c)

3.39

ND

ND