Franklin's - in Mint Sets, with White Corrosion

Besides the crystals being removed, not much changed with the white on the coin.

 

Log in or Sign up to hide this ad.

Some kind of dip could remove it, or could damage it.

"I been here 6 years and you hang my stuff in a bag on skid row?"
"Hey Mick how come I been put out of my locker?"
"Because Dipper needed it."

 

Looks like it may be time to put it up on eBay as the UNIQUE "MIME" VARIETY.

 

Largest known milkspot in the Franklin series

 

The silver cation, Ag+, reacts quickly with halide sources to produce the insoluble silver halide, which is a cream precipitate if Br- is used, a white precipitate if Cl−
is used. Wiki

Since they were likely packaged outside of the mint, it would be PMD. The plastic film is not intended for long term storage, IMO. Jim

 

Wonder what if anything can remove or neutralize it?

 

This from a chem site:
Ammonia solution is added to the precipitates. <--coin instead


original precipitate observation
AgCl precipitate dissolves to give a colourless solution
AgBr precipitate is almost unchanged using dilute ammonia solution, but dissolves in concentrated ammonia solution to give a colourless solution
AgI precipitate is insoluble in ammonia solution of any concentration


Best guess, but its bullion non the less. Use at own risk.

Jim

 

Hey, first try 100% acetone overnight and then 100% xylene overnight. No harm from either of them!

 

Just put it into uncut acetone. Will have to figure out where to get xylene.

 

will run over to home depot for the xylene later and change it out tonight

 

According to Rick Tomaska in his book 'A guide book of FRANKLIN & KENNEDY HALF DOLLARS" . He explains that certain years of Franklin Proofs are plagued by 'Milk Spots' and he has determined from former Mint Workers that it is soap residue on the planchets that were not well and completely rinsed. They are pressured in by the press and are part of the coin metal now and cannot be removed.

 

Someone in the packaging department had allergies and sneezed on them, after using a nose spray with ipratropium bromide in it. LOL Really, let us know how the soaks go.

 

9 hours in pure uncut Acetone - no noticeable impact

Just placed in uncut Xylene for the night. Tomorrow will try ammonia if no noticeable difference.

 

Wow, that looks so crusty.

 

This is not your normal milk spot. I believe he is talking about pinpoint or close spots from bad rinsing. This is a drop in the Pancake batter spot.

 

after a couple hours seems like something is happening. God only knows what this will look like in the morning.

 

Make sure to cover that glass so the liquid doesn't evaporate and redeposit the contaminants back onto the coin.

 

k

 

Wow, I didn't think that gunk would budge with any organic solvent, but there it goes! Can't wait for tomorrow's photo...