MSDS reports were suggested , but not required until 1983. A lot of cleaning, sterilizing, flammable. absorbed , etc. I think most of the...
And never put the sponges in the toaster to dry them.
I suspect a "dryer coin" myself.
If someone wants to check for sulfur in objects the simplest is using lead acetate test strips....
The darker areas are probably due to handling , whereas the lighter areas are surrounded by raised lettering. Notice in the motto , that a word...
By all means if you have children ( who probably will inherit your collection some day) take them , let them listen to you discussing the coins,...
Nickel and zinc can react with copper to make a whitish copper ( cupronickel). If done in a melt, it would likely stay in depth. If five cent...
I agree with alurid. Appears to me as a lot of human activity. IMO
Maybe you have noticed the darker color at about 90 degrees or so to each other. They are almost always occur from interacting with corrosive...
Well all, think of all of the money that members have saved new members that we have helped from sending in coins to the high cost graders to...
I would think that the vast majority of graders or all would use optical glass sequence microscopes rather than electronic display. IMO Jim
We are so happy to hear its going well. I must apologize as I didn't think of sending a couple of magnifiers. Some of the 99 cent stores have...
Mainly Sulfuric acid and Thiourea. SDS : https://aervoe.com/_files/msds/EzEst%20Coin%20Cleaner%201985%20-%20US%20Bulk.pdf
You could ask ICG for a Recheck, but have good reasons other than just disagreement as no grading company will change just to please ( unless you...
Likely, the die used to press the coin had some compacted metallic granules and grease in the recessed image on the die being used. If the...
For an interesting advertisement, look at " www.made-in-china.com" and input "China coin press machines" and you can see how it would be...
I am somewhat surprised that it is listed as it does seem to be an free advertisement . In the past just listing the title of the book. author(s)...
To me, I think someone worked on it sometime for contrast. VF cleaned.
Willie, you are a better man than that. He will have to decide how to determine what is what, himself. He may become a great coin expert on his...
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