I agree with The_Cave_Troll, alot of people will not even think of buying a Blue
IHC, they think it is AT all the way no matter what the
TPG's call market acceptable toning because it was usually caused by a chemical and most of them think of that as coin doctoring when a foreign material changes the color of a coin, even though there may be some natural things that will cause the same effect just most
IHC collectors will shy away from a Blur
IHC no matter what
TPG slab its in just because theer is a possibility it is from the chemical mentioned above. It seems totally different with silver coins like morgans/ They love the blues/greens/purples and any other color in the rainbow and will pay a premium for nicely toned coins, even though each and everyone of them know it can be replicated sometimes with something as simple as heat (and alot of the times are AT) but they take their chances. It is just one of the hobby anomolies to me how toning on one coin can be taboo and on another it can be desirable no matter how it got there