Hi everyone. I have a question I hope someone can answer. I have some Canada #449 - Atomic Reactor (1966) that have a much darker blue ink than other examples of the same stamp. The blue is so dark it shows clearly on the back of the stamp. Someone told me this is analine dye. I'm not sure what it is or what the stamps might be worth but they are definitely different than others of the same stamp. Any help would be much appreciated. Thanks and Happy New Year to all.

admare

50 Huron St.