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Anyone have any examples of what retoning with bleach looks like?
Boosibri
Posts: 12,755 ✭✭✭✭✭
Boosibri
Posts: 12,755 ✭✭✭✭✭
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I could for all I lnow, but I am afraid I have no idea what you are referring to....
"...retaining with bleach..." ? Is that something to do with dental retainers that automatically whiten your teeth?
[Sodium hypochlorite - NaClO]
Retoning, perhaps? If so, uniformly dark.
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According to JA
Yes retoning...stupid Apple
Latin American Collection
Most I have seen which I considered done by bleach were a chalky looking greyish black.
Chlorine. Sometimes with a little sodium hydroxide [NaOH] added as stabilizer.
You can also stick a coin into warm NaCl solution -- or just pop it in the oven with the beef roast.
chemically speaking, there is no difference between chlorine (Cl_2) and bleach (NaOCl) or hypochlorous acid (HOCl). There is a BIG difference between chlorine and sodium chloride, however.
chlorine can become reduced to Cl- which would cause something like copper to become oxidized (toned). This is why bleach (or chlorine) will retone coins.
Sodium chloride cannot oxidize anything. The negative chloride ion is already reduced and cannot be reduced further - a requirement for something else to be oxidized. The sodium ion COULD be reduced but it has a reduction potential of -2.71 V meaning that it cannot be reduced by silver or copper.
All comments reflect the opinion of the author, even when irrefutably accurate.
i put bleach on a silver round once to see how it would react...it just turns dark brown/grey...very dull looking.
I have tried bleach and saw nothing that would attract the tarnish market.... perhaps with other additives or process enhancements... but straight bleach just made the coin brown.... Cheers, RickO
I bleached a Morgan as a demonstration to answer a question and posted it on some forum, someplace a few months ago. If no one posts one by Tuesday, I'll do it again. PM me as a reminder in case I forget. Mostly, they just turn shades of gray. When you see one, you'll know for the future.
It's used to reduce the appearance of harsh cleaning, sometimes after polishing compound rubbed in with a cloth.
I had a bust half I thought was bleach toned, it was a glossy almost black color. came off with a dip.
@kaz said: "I had a bust half I thought was bleach toned, it was a glossy almost black color. came off with a dip."
I don't think so. The key word in your post is "thought."
I once saw a bleached AU 58 Bust $. It had an unnatural dull, battleship grey tone to it.
"Seu cabra da peste,
"Sou Mangueira......."
Never done it, but an interesting topic !!!