Color marks on zinkers, how?

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In any one of millions of ways, that's how.
Do you need a list?

 

Its a volatile combination.

 

If uncirculated.

 

Normal stuff with copper.

 

I'll post more pictures of this same coin. One will be lighting A and the other will be lighting B. I believe doing so may help narrow it down to "not just normal stuff with copper" and "not volatility" and may even to about 999,998 reasons less than 1,000,000. Under daylight, they simply appear to be the dreaded and prevalent 2010 and up "rinse spots" with only three on this coin manifesting what appear to be Heat Affected Zones from intense blue to straw visible, due to their much larger sizes. Not visible to the naked eye. Not visible with natural lighting, magnified or otherwise.

 

If you really want the absolute single reason for those spots, you will not get it, no matter how you phrase your question. Just pick a reason that satisfies you and stick to it.

 

Do note I haven't rephrased my very simple question, I have proffered to produce additional information with conditions specified.

You seem quite certain and your premise implying that I am trying to "lawyer" you, ie... have rephrased my question when in fact I have not, is one I find quite interesting even though your asserted responses appear somewhat removed from the cornerstones of civilization, communication and cooperation.

Thanks just the same and you are certainly entitled to reject this very simple presentation following basic scientific methods.

Regarding "toning", I've only observed these peculiar spots on 2010 up pennies. A box of BU 2016's is here that has an uncommonly high number of them whose even larger "toning spots" ;-) appear to have completely burned through the plating.

 

That is a beautiful coin and great photography. Thank you for sharing.

 

Say again in normal English.

 

No Sir, I'll post up additional information soon. No pretense although I do categorically reject the suggestion these are toning marks.

 

I refuse to restate what is written in clear 8th grade English.

 

If you read, without prejudice and preconception, what I have written and information I have provided, it will become patently clear to you that I already have done as you are requesting, and devoid of any attempts at distortions or obfuscation.

Fair enough?

I slipped out of a meeting to answer and will present the additional pictures later today.

 

I missed that grade. There was this really hot lady I was chasing.
Most folks involved with coins call this type of thing toning.
Looking forward to what you call it and the cause.

 

8th grade my foot

 

Outcome Based, No Child Left Behind or even Common Core Curriculums require 8th graders to have basic grammar and syntax mastery. They are also provided dictionaries for words they have forgotten their meanings or do not know.

Using a PC or even competent handheld device, the dictionary is as easy as left click, highlight, then right click on the high-lighted field to then prompt the pop-up menu to search via your favorite search engine.

Respectfully, I did not specify under-achieving, lazy or disadvantaged 8th graders.

 

Well, it is a toning phenomena. ANY color on metal besides the elemental color is from thin film interference of light.

See :https://forums.collectors.com/discu...nding-of-the-color-progression-on-toned-coins
,,, and some other links you can google under Sunnywood.

Chemical, heat, radiation , even hi energy light can cause toning by increasing a deposit of resultant material from such. The chemical type can originate from a loci of reaction, even on an uncirculated coin. The light waveform from sources have different penetrating power before they bounce off and produce an interference patter of color. Similar to thin oil film on a puddle. Different light sources have difference energy levels and artificial light is limit, whereas natural lighting usually has a mixture of wavelengths.

It isn't 8th grade Science either .

Jim