Cleaning Bullion Silver Coins and Bars Instantly

[Fluttershy]

sorry, no, there`s nothing I can think of really that would get around that, silver`s a very soft metal and despite being a nobel metal it`s still quite reactive IMO, and I`m guessing laser ablation is out the question, you could try propper lens brushes the sort with polonium doping, that might work for light marking without scratching it (it works on gold coated lenses and that`s even softer metal).

 

Bosse68:

less of a recipe and more of a method really.

other than cupellation, you could also do it chemically by dissolving the whole thing in acid (such as Nitric), and then once everybodys in the pool, you can then set about selectively dropping out each metal in order of reactivity (cementing).

but it depends what the base metal is that the silver is bound to that will determine the exact method of attack.

but for the most part you`de have to treat it as if it were a crude Ore and deal with it that way.

[StackemHigh]

sorry, no, there`s nothing I can think of really that would get around that, silver`s a very soft metal and despite being a nobel metal it`s still quite reactive IMO, and I`m guessing laser ablation is out the question, you could try propper lens brushes the sort with polonium doping, that might work for light marking without scratching it (it works on gold coated lenses and that`s even softer metal).

 

 

 

I can see a similar pattern here with the various levels of cleaning with the levels of encription used by software movie companies. Where level of encription to the ratio of proccessing power to decode and time relates to the strength of cleaner time used for and the damage caused by the action.

 

Both produce a simmilar chart.

 

A numi friend has been carrying out similar experiments with various lotions and potions.

 

An Olive oil bath seams to be  quite a good cleaner for the black gunge than some circulation coins have.

 

I am of course against the cleaning of  silver coins due to the damage caused.

 

I prefer the natural look of an old toned coin to the shinny bullion coin cleaned and polished to an inch of its life.

 

Poured bars are different some bars when cleaned can be much better looking.

[StackemHigh]

I would buy a cleaned coin if i knew it had been cleaned but only of because of availability or rareity.

[Pete]

.. you could try propper lens brushes the sort with polonium doping, that might work for light marking without scratching it (it works on gold coated lenses and that`s even softer metal).

Polonium eh ?

Isn't that the radioactive poison that allegedly killed the Russian in the news a couple of years ago ?

I was thinking along the lines of the polishing compounds that are used by glass lens manufacturers and polishers of scientific glass blanks used in lasers - they get perfection and even have scratch / dig specs.

[Ares]

I would buy a cleaned coin if i knew it had been cleaned but only of because of availability or rareity.

I 100% line up behind this.