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<p>[QUOTE=&quot;desertgem, post: 1167545, member: 15199&quot;]As with toning, I think you would find a similar consideration on Frost. On old time coins such as Morgans, frost is thought to occur from crystallization of the areas in the depth of a die from repetitive pressure of the strikes, or one authors comment that some specimen strikes show frost, from similar crystallization due to higher pressure die hubbing. The crystallization produces variations in depth of the metal surface, and these microscopic variations are then imposed on the higher surface of the blank when striking, and since then are random, chaotic, they produce the diffuse reflection of frost. Now this can be done artificially by sandblasting the inside of a die and then polishing only the high areas ( which are fields and won&#039;t show the frost), leaving the sandblasted inner areas frosted ( modern mint technique). So for these coins, frost is normal and even though some place higher value on it,&nbsp; it is intended.</p><p><br /></p><p>Frost can also be chemically added to a coin to enhance reduced frost ( such as after dipping too much), or add frost to a coin that didn&#039;t have it.Truly AF ( artificial frosting <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; )</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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