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<p>[QUOTE=&quot;desertgem, post: 1725996, member: 15199&quot;]Although the search function in the blue menu bar above takes some time and correct spelling, it will give you way more information. The technical, chemical and philosophical discussions of toning have been discussed multitude times by many knowledgeable members. The old high sulfur content paper has to have proper surrounding environment to be effective and the time period is usually in years or decades. Even back then we didn&#039;t unknowingly put a mint lustrous coin in such an envelope and take it out a week later with toning. Some of mine so stored took over 30 years.[/QUOTE]</p><p><br /></p>

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