Are most colorful toners from...

llafoe

stripped coins? That is coins that were recently dipped and then placed in high sulfuric content albums/holders?

AnkurJ

No.

Higashiyama

Dipped coins tend to retone with less interesting and vibrant colors.

A literal answer to the "most" question would perhaps be as follows:


(1) Morgan dollars from mint bags and

(2) 1947 - 1958 era mint sets

JRocco

A lot of times they do.
After a coin is dipped it tones completely differently, sometimes more wildly than a coin that has not been dipped.
They also tend to tone a lot faster than one that still has it's original skin which can
sometimes form a layer on it that can be obvious to some that know what to look for.

CCC2010

llafoe

I can understand end rollers... where one side is toned and one is white. I can understand bag toning... where one side is toned by the bag. In both cases, these were newly minted coins in contact with a high sulfur content... rolling paper or a canvas bag. What confuses me are the full toners... toned on both sides and the circulated toners. Even a blast white coin decades old has surface contamination that prevents sulfur from reacting to the metal. IMO, it appears you need a clean surface for toning to occur... and the most logical way to provide a clean surface is to freshly mint coins or dip them to remove the surface contamination?

fivecents

Gorgeous toning come from original intense luster. The more intense the luster the more vibrant colors. jmho