To my mind, a strike through either way, but in this instance the thing struck through hung around. :) It should catch a fingernail dragged...
Redeposits. The second rinse should handle that; although I recommended flipping them, it's not like the acetone is unable to reach the bottom...
Xylene is an organic solvent just like acetone, only nonpolar where acetone is more polar on the scale. You use them identically. There, that's...
Agreed. Maybe a little slice of something delaminated from a previous planchet? It would then look just like the metal of the coin it was embedded...
This. No rubbing, please. All you'll be doing is moving the grit around.
He needs to get with the National Reconnaissance Office regarding the appropriate optics when shooting images from orbit.
It won't "neutralize" it, but it could get so contaminated that it will redeposit some of the crud back onto the coins. In fact, plan on that...
The only thing that bothers me is the relative flatness of the upper obverse - hair, arms, upper stars - by comparison to the hammering the rest...
I'm thinking at least two bidders convinced themselves it's an Old Reverse. It took me a few minutes of playing with the image in the Gimp to...
Excellent! Don't forget to test the mesh for acetone resistance.
Generally, these tongs are designed to grip the coin by the rim, just like one would if holding with their fingers. It's never appropriate to...
Reverse is the side which contains the very difficult autograph of a prominent personality. Just like putting the toned side front on a...
The value of 1886-O skyrockets in Mint State condition. A genuine MS65 is a six-digit coin and nobody in their right mind would offer one worthy...
See? It's a pretty good gig if you can get it. :)
There are occasions - far rarer than tends to get discussed around here - when an appropriate conservation step for a coin is the use of thiourea,...
When I'm dipping I darned well do. :)
Common science project back in the day. We see - literally - a few every month here.
That's the last I'll have to do with you. I cannot understand why you are allowed to remain a member here.
Might want to research what processes like that can and cannot do first.
Winning.
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