[IAWA Forum] Pit border attraction

From: "Thomas Nilsson" <Thomas.Nilsson@trv.slu.se>
Subject: [IAWA Forum] Pit border attraction
Date: Tue, 2 Dec 2008 11:32:23 +0100 (CET)

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The paper by Matsunaga et al in the latest issue of IAWA Journal (Vol.
29,2008 p. 387-396) illustrates a phenomenon often observed, for which I
have not found an explanation. It is very obvious from their micrographs
that the copper carbonate and iron oxide nanoparticles accumulate on the
pit borders. I have observed that bacteria, tiny air bubbles, tiny
creosote particles and iron containing particles observed in waterlogged
archaeological wood also accumulate on the pit borders. Air bubbles may
sometimes give an illusion of pit border degradation. Grateful for any
explanations.
Thomas Nilsson
SP Trätek
Stockholm
SWEDEN
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