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<p>[QUOTE="Sealgair, post: 3221691, member: 97867"]It has long been standard museum practice to write an acquisition or catalogue number in India ink on objects, so long as the marks could be removed fairly easily. So they are often found on metal, glazed ceramic or glass but not much on paper or cloth. Micro laser-engraving is being used in some cases, but many professionals feel that this is an unacceptable changing of the object (“First, do no harm” applies here as well), even if the mark is not visible with the naked eye. Notice how, if an object is reconstructed in any way, the new parts will always be readily distinct—just look at Classical pottery, where crack-filler will be in a totally different color than any part of the original pot. And coin holders are very new, after all, so maybe we will start seeing them more in the future.[/QUOTE]</p><p><br /></p>
[QUOTE="Sealgair, post: 3221691, member: 97867"]It has long been standard museum practice to write an acquisition or catalogue number in India ink on objects, so long as the marks could be removed fairly easily. So they are often found on metal, glazed ceramic or glass but not much on paper or cloth. Micro laser-engraving is being used in some cases, but many professionals feel that this is an unacceptable changing of the object (“First, do no harm” applies here as well), even if the mark is not visible with the naked eye. Notice how, if an object is reconstructed in any way, the new parts will always be readily distinct—just look at Classical pottery, where crack-filler will be in a totally different color than any part of the original pot. And coin holders are very new, after all, so maybe we will start seeing them more in the future.[/QUOTE]
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