Silver hammered coin - electrolysis before and after

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Silver hammered coin - electrolysis before and after

Post by Oxgirl36 » Sun May 19, 2019 7:17 pm

Ok found these two on a new field today. Ones a silver half groat the other is a pierced copper coin, probably a jetton. I’ve tried the spit and foil on the hammie but it’s not doing much and I’m scared of damaging it further (it’s pretty poor condition). So do I soak it in lemon juice or electrolysis? The copper I’m stumped with what to do.

I just want to get them good enough to ID really. Any advice you could give I would be very grateful.
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Re: Cleaning help please

Post by Me and my boy » Sun May 19, 2019 7:26 pm

Hi Oxgirl,

I would zap the silver one, Defiantly.

Ps well done.

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Re: Cleaning help please

Post by Blackadder43 » Sun May 19, 2019 7:33 pm

Many moons ago when i detected like a demon i had a similar condition hammy
Over the course of a couple of nights i zapped it, took it out, zapped it, took it out
Finally a lot of the crud fell away and allowed the tin foil trick to do its work
Percy verance (spelling) is needed here
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Re: Cleaning help please

Post by Bradrick » Sun May 19, 2019 8:33 pm

Looks a bit flaky that one OG... I'd be tempted to try a soak first.
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Re: Cleaning help please

Post by Fusion » Sun May 19, 2019 9:28 pm

An acid soak won't harm the high silver content hammered, and it may remove a bit of the corrosion, if there's any copper salts, for example. But it's going to need something more effective, like electrolysis to really shift the 'patina'

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Re: Cleaning help please

Post by garrettoldboy » Sun May 19, 2019 10:30 pm

hello, what cleaners do you have ??

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Re: Cleaning help please

Post by Oxgirl36 » Sun May 19, 2019 10:39 pm

I have electrolysis and a good ultrasonic.

I’m thinking I’ll go electrolysis- that is if I can find the darn thing!
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Re: Cleaning help please

Post by littleboot » Sun May 19, 2019 10:49 pm

Deffo zap the silver as it will be good enough silver to take it, The jeton/copper leave. Just a touch of wax maybe.
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Re: Cleaning help please

Post by Allectus » Sun May 19, 2019 11:32 pm

A York groat/halfgroat. Definitely in need of a few zaps! ::g

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Re: Cleaning help please

Post by garrettoldboy » Mon May 20, 2019 9:50 pm

Oxgirl36 wrote:
Sun May 19, 2019 10:39 pm
I have electrolysis and a good ultrasonic.

I’m thinking I’ll go electrolysis- that is if I can find the darn thing!
hello, i would do top coin first in the ultrasonic in warm water with a bit of washing up liquid, and bottom one in the electro.

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Re: Cleaning help please

Post by Koala » Mon May 20, 2019 10:10 pm

coppers like that I soak in caustic soda

it will not harm the copper but will ruin any patina by turning it black.

then scrape the black off with a fiberglass pen. Unfortunately its going to fairly blank whatever you do

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Re: Cleaning help please

Post by vladorado » Mon May 20, 2019 10:22 pm

Just rub it with wet baking soda with you fingers.
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Re: Cleaning help please

Post by Oxgirl36 » Mon May 20, 2019 10:25 pm

Electrolysis was used. I like electrolysis now, it’s very satisfying watching it bubble away and the crud literally bubbling off it :D
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For the ID thread go here viewtopic.php?f=120&t=111747

Method


I first soaked it in an olive oil and lemon mix warmed by putting a smaller dish (with the coin and the mix) inside a bigger bowl with boiling water. Left for an hour or two. Washed with soap and gave it a little brush. Then used an old phone charger with warm water and loads of salt. Got it out and used toothbrush after about 2 minutes. The water was filthy so changed it for fresh with more salt. Repeated. Washed it. Then a gentle rub over with tin foil. I wanted to keep some patina.

Last time i tried this I put the clips on according to the instructions supplied but it looks like the supplier has done them the wrong way round =))

Thank you all very much for all your advice and help. It was really appreciated. For now I’ll leave the copper one. I suspect it’s beyond redemption ;))
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Re: Silver hammered coin - electrolysis before and after

Post by Lowland » Mon May 20, 2019 10:55 pm

Just need to find some More big’uns to practice on now ::g
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Re: Silver hammered coin - electrolysis before and after

Post by Merneo » Sat Nov 16, 2019 8:36 am

Hi, Cath

Does the point of attachment of the electrode suffer from the process in the cleaning ?

is there anything you need to do to prevent this ?

this thread could do with a electrocution 101 sticky - ( no not volunteering ) also the other methods

so people can have a reliable quick reference before searching the threads for extra info

let me know

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Re: Silver hammered coin - electrolysis before and after

Post by fred » Sat Nov 16, 2019 9:57 am

That came out well! ::g
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Re: Silver hammered coin - electrolysis before and after

Post by Oxgirl36 » Sat Nov 16, 2019 10:05 am

Merneo wrote:
Sat Nov 16, 2019 8:36 am
Hi, Cath

Does the point of attachment of the electrode suffer from the process in the cleaning ?

is there anything you need to do to prevent this ?

this thread could do with a electrocution 101 sticky - ( no not volunteering ) also the other methods

so people can have a reliable quick reference before searching the threads for extra info

let me know

Paul
Yes they do corrode and the only way to avoid it is to clip them outside the water and rotate the item.

My method is the one that works for me. Many others would not recommend salt and I'm by no means an expert. I think there's room for an electrolysis thread to be stickied but not this one. Happy if someone with expertise to do one ::g
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Re: Silver hammered coin - electrolysis before and after

Post by Merneo » Sat Nov 16, 2019 5:41 pm

I agree

I think a cleaning 101 synopsis sticky with maybe a link from each section to the full thread

it might order things a little better each thread might need its own sticky with the best of the info that people need as its head then discussion etc to follow

I declare my interest - That this is info I would like to be able to learn from

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Re: Silver hammered coin - electrolysis before and after

Post by bryan162 » Sat Nov 16, 2019 9:00 pm

Well done it cleaned up well ::g

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Re: Silver hammered coin - electrolysis before and after

Post by jones123 » Sat Nov 16, 2019 9:27 pm

I find using a pencil rubber efficiency removes silver tarnish, although not saying this is safe on anything valuable ::g

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Re: Silver hammered coin - electrolysis before and after

Post by Oxgirl36 » Sat Nov 16, 2019 10:17 pm

jones123 wrote:
Sat Nov 16, 2019 9:27 pm
I find using a pencil rubber efficiency removes silver tarnish, although not saying this is safe on anything valuable ::g
That works brilliantly ::g
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Re: Silver hammered coin - electrolysis before and after

Post by smudge.g » Sat Nov 16, 2019 10:26 pm

I would be wary of using electrolysis and salt as a electrolyte when cleaning coppers. They can literally melt if left too long (know from experience!!) :)
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Re: Silver hammered coin - electrolysis before and after

Post by lordofthecoils » Sat Nov 16, 2019 10:33 pm

A great result , a nice displayable coin , well done ::g ::g ::g ::g ::g

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Re: Silver hammered coin - electrolysis before and after

Post by Oxgirl36 » Sat Nov 16, 2019 11:09 pm

smudge.g wrote:
Sat Nov 16, 2019 10:26 pm
I would be wary of using electrolysis and salt as a electrolyte when cleaning coppers. They can literally melt if left too long (know from experience!!) :)
Agree with you wholeheartedly. Viscous on copper, but works well on silver ::g
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Re: Silver hammered coin - electrolysis before and after

Post by Ten pence! » Sun Nov 17, 2019 12:55 am

I give zapped silver coins a rub with bicarbonate of soda, this will gently remove the remaining residue left on the coin after electrolysis and will not scratch the silver, which may well happen if you use anything abrasive. If you overdo it slightly, bicarb will burnish silver, a quick dip in bleach will retone the coin.

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Re: Silver hammered coin - electrolysis before and after

Post by ratty » Mon Nov 18, 2019 9:19 am

For delicate silver I have used a piece of sheet aluminium in a solution of washing soda, with the silver item in contact with the plate the tarnish will simply wipe off. It can take several dips to remove heavy crud as the reaction is very gentle.

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Re: Silver hammered coin - electrolysis before and after

Post by onions » Mon Nov 18, 2019 2:09 pm

I'll go straight to hell for saying this but I've used the odd Brillo pad on coins, even Hammerers. I'll go and sit on the naughty step right away.

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Re: Silver hammered coin - electrolysis before and after

Post by ratty » Mon Nov 18, 2019 6:10 pm

Heathen, make sure there is a brilo pad on the step when you sit on it... 8-|

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