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Hot pin test lasts less than 1 sec. so in that case it can not make any damage.

If it is real ivory hot pin can not make any damege, if it is not ivory (plastic or substitute) probably it is not worth much so who cares about hot pin damage.

Few days ago I recived the razor with Ivory scales (seller told that scales are Ivory) but I want to be sure so I did few tests and inspections.
One of them was with UV light so down is a photo of...