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Table 2 Documents required for the fitness-for-use assessment workshops, with combinations of aspects of degradation: tears (T), missing pieces (MP) and discolouration (D), as required by the CCD response surface design, with three repetitions of the centre point

From: Damage function for historic paper. Part I: Fitness for use

Document no.

T

MP

D

1

0

0

0

2

2

0

0

3

0

2

0

4

2

2

0

5

0

0

2

6

2

0

2

7

0

2

2

8

2

2

2

9

0

1

1

10

2

1

1

11

1

0

1

12

1

2

1

13

1

1

0

14

1

1

2

15

1

1

1

16

1

1

1

17

1

1

1