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<p>[QUOTE=&quot;Conder101, post: 426672, member: 66&quot;]I don&#039;t think the type of light would have too much of an effect.&nbsp; The key thing is the amount of heating the light souce provided to the coin.&nbsp; I would think that florescents would be a cold light source and would not provide much of a warming effect.&nbsp; Heat lamps would probably provide too much heat and result in odd colors.&nbsp; I would think intense incandescents would work best.&nbsp; Possible a high wattage halogen if you wanted to speed things up a bit.</p><p><br /></p><p>I also agree with GD, intent is usually the only real difference between AT and NT.&nbsp; They tend to use the same chemicals and produce the same chemical products on the surface of the coin and often the same appearance.&nbsp; The only difference is in the amount of time it takes for the reactants to appear.&nbsp; And sometimes NT can occur quickly as well.&nbsp; this just leaves intent.&nbsp; The problem is, just looking at the coin you often can&#039;t know for sure how the toning formed, and there is no way you can divine what the intent of the person who put it there was.[/QUOTE]</p><p><br /></p>

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