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Test for chrome tanned leather
- To: BOOK_ARTS-L@xxxxxxxxxxxxxxxx
- Subject: Test for chrome tanned leather
- From: Cor Knops <knops@xxxxxxxxx>
- Date: Mon, 27 Jul 1998 10:17:54 +0200
- Message-id: <199807270818.BAA20784@SUL-Server-2.Stanford.edu>
- Organization: Knops Boekrestauratie
- Sender: "Book_Arts-L: On the web at http://www.dreamscape.com/pdverhey" <BOOK_ARTS-L@xxxxxxxxxxxxxxxx>
(apologies for cross-posting this message):
Recently I bought 12 calfskins which are vegetably tanned. At least that's what the
vendor claims. Working with the leather (paring, gluing) it seems to me that is is at
least a different type of leather and I wonder if it is minerally (after)tanned with chrome.
Is there a SIMPLE way to determine wether there's chrome involved in the tanning of
this leather ? So no spectometry etc. but a test which can be done "at home".
I know of the blueisch/greyisch layer between the grain and fleshside but that is only
very faint (still it is there...). I've also tried a simple shrinkage test (chrome tanned
leather normally has a higher Ts but both samples (old and new) shrank below 100 C)
Any tips are very much appreciated.
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