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Strange discoloration discovered after storing antique African pot
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<p>[QUOTE="2manybooks, post: 9821015, member: 8267"]Sorry, I misunderstood. I took your first post to mean that it had been in your attic for decades.</p><p><br /></p><p><br /></p><p>Substances can, indeed, migrate through porous pottery. It is one of the features that made such jars good for water storage. As small amounts of water moved to the surface and evaporated it helped keep the water in the jar cool, similar to a modern evaporative "swamp cooler". </p><p><br /></p><p><br /></p><p>Mold is not fluffy in all stages of growth, and can leave stubborn stains. I believe it would only grow if there was some type of organic residue present, as well as a localized source of moisture.</p><p><br /></p><p>It is an interesting phenomenon. Explaining it might require a careful examination and analysis of the surface, as well as an assessment of the conditions in the specific place it was stored. Is there a university or museum near you that has a conservation department?[/QUOTE]</p><p><br /></p>
[QUOTE="2manybooks, post: 9821015, member: 8267"]Sorry, I misunderstood. I took your first post to mean that it had been in your attic for decades. Substances can, indeed, migrate through porous pottery. It is one of the features that made such jars good for water storage. As small amounts of water moved to the surface and evaporated it helped keep the water in the jar cool, similar to a modern evaporative "swamp cooler". Mold is not fluffy in all stages of growth, and can leave stubborn stains. I believe it would only grow if there was some type of organic residue present, as well as a localized source of moisture. It is an interesting phenomenon. Explaining it might require a careful examination and analysis of the surface, as well as an assessment of the conditions in the specific place it was stored. Is there a university or museum near you that has a conservation department?[/QUOTE]
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