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<p>[QUOTE="GDJMSP, post: 2281416, member: 112"]Regarding the halo effect, it is not uncommon for the halo to be light, or dark. Both occur with equal regularity, but typically at different points in time during the life of a coin.</p><p><br /></p><p>For example, all coins begin to tone immediately after being struck. And the areas of the coin that tend to tone first are those that are the most exposed, or those closest to or in direct contact with another item - eg: a coin album, holder, envelope, etc etc. In other words toning will usually begin near the edges and work its way inwards, in the open fields, or sometimes even the devices.</p><p><br /></p><p>But when this happens the protected areas in and around the legends and/or close to the devices do not tone as quickly. Thus they stay light in color. This typically continues in this manner until, over time, the toning catches up and becomes more even across the entire coin.</p><p><br /></p><p>This is true of coins that are being stored in a collection as well as coins that are in circulation. Coin begin life being light in color and become gradually darker as time passes. But, with coins that are in circulation, as wear progresses, the more exposed areas of the coin receive the most wear. Wear rubs away the darker color in the more exposed areas thus creating the reverse effect. The halo in protected areas is now darker than the areas that are being subjected to the most wear because the the darker toning is being worn away. And the toning in the protected areas becomes even darker yet because it is not being touched.</p><p><br /></p><p>A similar effect can also occur because of the gradual accumulation of dirt and grime that coins in circulation are exposed to. The dirt and grime accumulates in the protected areas and stays there because nothing can touch it and wear it away. But the dirt and grime in the open areas of the coin, and on the high points of the coin is worn away by contact. </p><p><br /></p><p>Once you stop and think about it it's really all just common sense as to how to and why the halo effect occurs, and whether it is light or dark in color.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 2281416, member: 112"]Regarding the halo effect, it is not uncommon for the halo to be light, or dark. Both occur with equal regularity, but typically at different points in time during the life of a coin. For example, all coins begin to tone immediately after being struck. And the areas of the coin that tend to tone first are those that are the most exposed, or those closest to or in direct contact with another item - eg: a coin album, holder, envelope, etc etc. In other words toning will usually begin near the edges and work its way inwards, in the open fields, or sometimes even the devices. But when this happens the protected areas in and around the legends and/or close to the devices do not tone as quickly. Thus they stay light in color. This typically continues in this manner until, over time, the toning catches up and becomes more even across the entire coin. This is true of coins that are being stored in a collection as well as coins that are in circulation. Coin begin life being light in color and become gradually darker as time passes. But, with coins that are in circulation, as wear progresses, the more exposed areas of the coin receive the most wear. Wear rubs away the darker color in the more exposed areas thus creating the reverse effect. The halo in protected areas is now darker than the areas that are being subjected to the most wear because the the darker toning is being worn away. And the toning in the protected areas becomes even darker yet because it is not being touched. A similar effect can also occur because of the gradual accumulation of dirt and grime that coins in circulation are exposed to. The dirt and grime accumulates in the protected areas and stays there because nothing can touch it and wear it away. But the dirt and grime in the open areas of the coin, and on the high points of the coin is worn away by contact. Once you stop and think about it it's really all just common sense as to how to and why the halo effect occurs, and whether it is light or dark in color.[/QUOTE]
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