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Heritage Science

Table 2 Historical parchment samples and exposure time in the x-ray beam used

From: Is there evidence for change to collagen within parchment samples after exposure to an X-ray dose during high contrast X-ray microtomography? a multi technique investigation

Sample code

Year dated

Exposure time in the X-ray beam (hours)

1769 C

1769*

0

1769 2 hr

1769*

2

1775 C

1775*

0

1775 2 hr

1775*

2

1817 C

1817*

0

1817 2 hr

1817*

2

1828 C

1828*

0

1828 2 hr

1828*

2

1832 C

1832*

0

1832 2 hr

1832*

2

Modern 01

N/A

2.16

Modern 02

N/A

2.36

Modern 03

N/A

12

Modern 04

N/A

0

  1. *Sample age is estimated from dates inscribed on the parchment sheets at the time of initial parchment use.
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