White film left after dipping - how to fix this?

I had an old and severely tarnished 1964 quarter that I wanted to experiment with so after making a solution of 1:1 silver jewelry cleaner and water, the coin now shows a white film where the toning and tarnish once was. Is there any way to prevent this from happening? Maybe I'm using an incorrect dipping concoction?? (BTW, soap and water did nothing as far as removing the grime or grey toning)

 

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Sometimes toning can start to react with the planchet... especially in the event of environmental damage that usually causes severe and unattractive toning. Under this toning the surfaces can become impaired and once the toning is removed you see the damage. Which is usually white and lusterless.

 

The best way to not get a film after dipping is to not dip.

 

...DON'T BE A DIP! :bow:

 

Deeply toned coins often do not dip well and leave either a filmish appearance on the coin or leave a yellow or urine color stain on the coins. This is likely due to that fact that the oxidized layer of silver is deep enough to etch the coin to a very mild degree. In these instances there is little one can generally do to save any luster since the flow lines that create luster will be pretty much destroyed.

 

Really? Besides using acetone to get rid of PVC, what other conditions warrant dipping?

 

Ugly & unattractive toning on a mint state coin.

 

I trust that you are speaking of silver coins only.

 

Can you not stop the continuing toning by changing the coins environment and avoid stripping skin?

 

Mycohopper, out of curiosity, what "silver jewelry cleaner" did you dilute and use?

 

Using acetone and dipping are two very different things, cannot be used interchangeable, and should be thought of in very separate ways.

Abnd doug, my first post was mostly tongue in cheek - there are a few cases where even I would recommend dipping. They are much rarer than most other people, however.

 

I had a similar thing happen recently with a tarnished quarter my grandmother gave me when I was a child (i.e. sentimental value, no numismatic value). The film after dipping was removed by vigorus rubbing with a soft cloth. Of course, I wouldn't recommend this for any coin of value.

 

The only kind that I've tried, so far, is Tarn-X. What other dips do you guys recommend I try?

 

what you gforgot about the dip baths :d


tsk tsk

 

Thanks for the answer. Somewhat I expected. Tarn-x is thiourea and sulfamic acid ( same materials as found in silver coin dip) and a proprietary "polishing" material. It is designed to remove the tarnish and the polish will attach to the surface of the " say silver spoon" and is generally a abrasive was to be rubbed off with a cloth, leaving a shining silver surface. I suspect some of the white material could be polish remnants, maybe even in some of the surface pits and would not rinse out with water.

I would try pure acetone to see if it might dissolve any polish material. Shouldn't hurt the coin. Use glass containers, preferably outside away from flames, and repeat with a new solution each time. In California, used acetone can be allowed to evaporate.