Toning In US Uncirculated Mint Sets (Newer Than Late 1960-S)

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Author	Replies: 2 / Views: 912
ijn1944 Bedrock of the Community United States 19126 Posts	Posted 10/04/2018 8:10 pm My apologies if this topic has been addressed in the past. I've searched the site and haven't found what I'm looking for. Here we go... I've noticed that some US uncirculated mint sets in cellophane packaging have fairly high occurrences of toning--particularly the 1976 sets, both P and D mints, with the P mint having a higher incidence. Often, the 1976 P Ike dollar has a warm gold tone--some very warm. Also, the 1976 P cent can have a very warm red tone. What is the cause of toning in cellophane uncirculated sets? Thanks. Edited by ijn1944 10/04/2018 8:15 pm Report this Post to the Staff

GrapeCollects Pillar of the Community United States 8938 Posts	Posted 10/04/2018 10:09 pm Sulfer usually as well as nitrogen Report this Post to the Staff
Kopper Ken Pillar of the Community United States 3402 Posts	Posted 10/04/2018 10:13 pm It doesn't mean that the plastic is impermeable and there may be substances in the plastic itself or the coin was handled with a substance. KK Report this Post to the Staff
	Replies: 2 / Views: 912

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