Re: textile dating

[Solitaire Sani <Solitaire.<Sani@xxxxxxxxxx>>]

Sorry, I couldn't e-mail Joan Kiplinger directly and thought that this info
could be interesting to others.


Hi Joan, my name is Solitaire Sani and am in the process of continuing my
research project, which involves the radiocarbon dating of textiles.

Radiocarbon dating involves the use of an accelerator mass spectrometer to
count the amount of carbon 14 within the sample. Approximately 30 milligrams
of textile is required for testing and it is destructive. It is true that
this method returns dates with large errors for younger textiles. It gives
more accurate dates for archaeological samples, ie. 1000's of years old.
There are many factors involved and it could be possible, but I don't think
it will be accurate enough for the dating of WWI textiles.

Maybe a good idea would be to contact a dating laboratory, here are a few
that I contacted:

BETA Analytic Inc. Miami, Florida.
WEB: www.radioarbon.com
E-MAIL: beta @radiocarbon.com

NFS - Arizona AMS Laboratory
WEB: www.physics.arizona.edu/ams
E-MAIL: mitzi@xxxxxxxxxxxxxxxxxxx

Oxford University
WEB: www.rlaha.ox.ac.uk
E-MAIL: orau@xxxxxxxxxxxxxx

Rafter Radiocarbon Laboratory
WEB: www.rafterradiocarbon.co.nz
E-MAIL: d.chambers@xxxxxxxxxx


If you want to do some reading about radiocarbon dating:

BOWMAN, S. (1990) Radiocarbon dating.

Aitken, M.J. (1990) Science-based dating in archaeology.

JULL, A.J.T. & DONAHUE, D.J. (1990). Radiocarbon dating with accelerator
methods and application to textiles. Orientations 21(6), Pp. 75-79.

This should help you gather an understanding of what can or can't be done.
Good luck with the project, if you need anything more don't hesitate to
contact me. solitaire.sani@xxxxxxxxxx

Kind regards, Solitaire Sani.


-----Original Message-----
From: Joan Kiplinger [mailto:jkip@xxxxxxxxx]
Sent: Wednesday, 11 September 2002 0:00
To: TEXCONS@xxxxxxxxxxx
Subject: textile dating


    What is the current method[s] or forensics used by museums and other
institutions to date fabric, particularly historical to WWI?
     I've heard about a carbon method and a newer technology using laser
and now some persons are saying DNA. Others say that these methods are
not appropriate as they can only date in hundred-year or larger
increments; rather dyes are the most definitive method.
     Any light shed on this subject would be appreciated as well as
books or other printed matter to read.