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Found this chip off the old block, Apostle Island 2018 quarter, just starting to bloom.

emeraldATVemeraldATV Posts: 4,968 ✭✭✭✭✭

Awhile back I was given a similar coin with massive NT, in pocket change. (Shown on the right side in the panel)
The coin in the spot light, was also given in pocket change. ( Shown on the left side )
I'll call it the rental, I'll explain why.
My computer detected, on it's own, a very slight hue of green and red in the center of the rental's reverse.
The reason this was set up like this, is so to show the difference, between the two coin's reverse side strikes.
I know most of you have seen the oil slick coin before. (NT, right side) ( Gotta change that name )


.

In the left panel, you can clearly see a die chip, under the right arm as it paddles along.
Inside that chip is a capitol R. Thus the name, The Rental. (What?)

In the center the green hue is present, as on the other coin, but not as pronounced.
Oh !
One other thing I noticed,
The person in the left kayak has dark hair.
The person in the right side kayak is blonde.

Think there's any more out there ?

Comments

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭

    Awesome patina comparison study you got going on there 👍🏼

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭

    Please update us with more like this, I dig it

    Mr_Spud

  • emeraldATVemeraldATV Posts: 4,968 ✭✭✭✭✭

    Of course.
    Kind of a study on the AT or NT subject.
    I can say this about that.
    Progression, or some what of it, could shed a bit more light on color factors.

    You just have to play and say.

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭
    edited September 7, 2025 4:22PM

    Cool, We use Pantone colors at my work a lot in order to have our customers pick colors that they want their softgels to look like. Here’s 2 of my favorite colors, only I don’t think the pearlescent ruby red matches any of the Pantone colors because of the pearlescence


    But the pearlescence reminds me of some types of coin toning. There also are pearlescent colors made by cocrystallizing mica and titanium dioxide that gives the color through thin film interference just like coin toning, and involves no dyes. Only it’s the thickness of the cocrystals. Here’s some examples

    And here’s my old AT experiment that shows the progression of colors as the coin goes through the AT process. This is the same coin with the pictures taken every few seconds to show the progression as the interference film grows thicker

    And here’s some of my old AT experiments where I made gradients of color and deliberately tried to get some green and red. I know they look amateurish, but I just wanted to do this for educational reason and not really interested in doing it to learn how to doctor coins. It’s just that I’m a scientist.

    And here’s some toner tokens that I bought that I think are probably NT, hard to tell for sure whether or not someone enhanced the toning somehow or not, but I think they look great and am happy to own them

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭
    edited September 7, 2025 1:55PM

    @emeraldATV said:

    My computer detected, on it's own, a very slight hue of green and red in the center of the rental's
    I know most of you have seen the oil slick coin before. (NT, right side) ( Gotta change that name )


    .

    In the left panel, you can clearly see a die chip, under the right arm as it paddles along.
    Inside that chip is a capitol R. Thus the name, The Rental. (What?)

    In the center the green hue is present, as on the other coin, but not as pronounced.

    Green and Red are hard, but not impossible, to get on AT coins, also rare on NT coins. Also, in the normal progression on the easy to do AT process they basically don’t exist at all, except for a brief moment as seen below in the 5th image below. See that bit of green on the right side of the coin in the 5th image, too hard to stop the process at the fleeting short time slot that the flash of green happens at. I’m not sure why, just that it is.

    Also, in nature, there sometimes is what is called “the green flash” at sunset when conditions are just right. I’ve been close to capturing it with my iPhone down at the beach 6 blocks from my house, but the green is exclusive and rare. Here’s explanation of the “green flash” at sunset.

    And here’s some of my green flash pictures, only it’s more reddish yellow, maybe just a hint of green. I also took some with my fancy DSLR camera with telephoto lens, but haven’t even had the time to upload them yet, let alone to see if I captured the green. Here’s some from my iPhone that I turned into a GIF (hopefully this loads properly, if not I’ll fix it later, gotta go out for a while)

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭
    edited September 7, 2025 8:17PM

    The GIF file I was trying to post was too big to load right. Here’s a smaller one showing a GIF of just one of the “green flash” Live Photos I took down at the beach at sunset. I like how the bird seems to be flying straight out of the flash.

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭
    edited September 7, 2025 7:54PM

    Reminds me of the Green Hornet And Green Flash, maybe I need that ring to slow down time enough to capture the green flash at sunset maybe? 🤔. 😉


    But back to coins, I’ve heard rumors that some of the Coin Doctors try to duplicate conditions on Jupiter and Saturn to get the crystal structure to be iridescent/pearlescent and “mica like” with a bit of green showing up here and there

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭

    Continued - I am hoping @emeraldATV will give us a his take on the “Green Flash”. At first glance he appears to be not a serious person, but I believe otherwise and that there is a reason his avatar name has “emerald” in it. I know for sure he was a graphic designer/artist in the analog days and I’d love to hear more of what he knows

    Mr_Spud

  • emeraldATVemeraldATV Posts: 4,968 ✭✭✭✭✭

    In this group of photo's of the coin on the right (the oil slick), may show it's true colors as my design
    program will seek out a coin's skin color. as the app detects.
    The colors are true as seen in the photo and also on screen. This is now my guide to examine within it's originality.
    After this happens, I use the sharpness effect very carefully. The sharpness, is also used as a guide.
    Sometimes if too sharp, so are the highlights, as they blur the image and knock out color.

       - Next effect is Brightness and Contrast. I use this effect as one adjustment. -
    

    Reason why is because when brightness and contrast is called for, both issues have their own separate scale in this app as if it's only one effect (2 scales) producing one final photo.
    1. a : juxtaposition of dissimilar elements (such as color, tone ) b : degree of difference between the lightest and darkest parts.
    What do you think about the one photo below that was created this way ?
    Do you see any "significant" change in it's color ?

  • emeraldATVemeraldATV Posts: 4,968 ✭✭✭✭✭

    This coin below I would call it over done with great tone (color).
    By overdone I mean, having very heavy multi color reactions.
    There has to be some kind of twin showing progression out there.

    This enhanced bottom photo's color was never changed.
    WAIT ! That statement is wrong.
    ONLY ONE COLOR CHANGE WAS DONE.
    The color of the circle (not added) above the buildings (sun or moon ?) was changed, just because.

  • emeraldATVemeraldATV Posts: 4,968 ✭✭✭✭✭

    UNTOUCHED

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭

    @emeraldATV said:
    In this group of photo's of the coin on the right (the oil slick), may show it's true colors as my design
    program will seek out a coin's skin color. as the app detects.
    The colors are true as seen in the photo and also on screen. This is now my guide to examine within it's originality.
    After this happens, I use the sharpness effect very carefully. The sharpness, is also used as a guide.
    Sometimes if too sharp, so are the highlights, as they blur the image and knock out color.

       - Next effect is Brightness and Contrast. I use this effect as one adjustment. -
    

    Reason why is because when brightness and contrast is called for, both issues have their own separate scale in this app as if it's only one effect (2 scales) producing one final photo.
    1. a : juxtaposition of dissimilar elements (such as color, tone ) b : degree of difference between the lightest and darkest parts.
    What do you think about the one photo below that was created this way ?
    Do you see any "significant" change in it's color ?

    The enhanced one definately brings out the green making it much easier to see. That’s cool how you did it without bumping up the saturation. Bumping the saturation would also bring out the green, but would also make every other color show up more. The way you did it with the simultaneous brightness and color adjustment made the green pop more without enhancing the other colors. That’s really cool and interesting to me, thanks.

    Mr_Spud

  • Mr_SpudMr_Spud Posts: 6,279 ✭✭✭✭✭

    @emeraldATV said:
    This coin below I would call it over done with great tone (color).
    By overdone I mean, having very heavy multi color reactions.
    There has to be some kind of twin showing progression out there.

    This enhanced bottom photo's color was never changed.
    WAIT ! That statement is wrong.
    ONLY ONE COLOR CHANGE WAS DONE.
    The color of the circle (not added) above the buildings (sun or moon ?) was changed, just because.

    I posted the previous post without reading the one I’m quoting with this current post. It reinforces what I was thinking when I responded in the post above. Once again, very cool and also very interesting to me, thanks.

    Mr_Spud

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