Angad on fri 26 nov 99
------------------
Hi,
I am a potter living in South India. Recently I have been joined by a friend=
who
likes to work with lustre glazes and we have been using Silver Carbonate. =
Here
it costs about =2435 for 25 gms. if you can get it. However Silver Nitrate =
costs
around =2410 for 25 gms. Question is it better to use Silver carbonate or is=
the
Nitrate better? Since the nitrate is solouble and also stains everything it
touches is there a way to convert the nitrate to the carbonate? I hope there=
is
some one out there with enough knowledge of chemistry who can help me. =
Please
write direct to me if possible.
Thanks,
Angad Vohra
Mantra
Kottakarai
Auroville 605 101.
Tamil Nadu.
India
Tel: +91 413 622173/622567
Fax: +91 413 622274
www.auroville-products.com/
Michael Banks on sun 28 nov 99
Can't say whether silver carb is better than silver nitrate, but you can
prepare your own silver carbonate by adding sodium carbonate (soda ash) to
silver nitrate solution. The fairly insoluble silver carbonate is
precipitated as a pale yellow salt and can be filtered out. Sounds like
quite a cost saving to make your own..
Michael Banks
Nelson,
New Zealand
Angad Vohra wrote,
I am a potter living in South India. Recently I have been joined by a friend
who
likes to work with lustre glazes and we have been using Silver Carbonate.
Here
it costs about $35 for 25 gms. if you can get it. However Silver Nitrate
costs
around $10 for 25 gms. Question is it better to use Silver carbonate or is
the
Nitrate better? Since the nitrate is solouble and also stains everything it
touches is there a way to convert the nitrate to the carbonate? I hope there
is
some one out there with enough knowledge of chemistry who can help me.
Please
write direct to me if possible.
Thanks,
Evan Dresel on wed 1 dec 99
If you do this use an excess of sodium carbonate -- not so much to
saturate the solution but you want to overwhelm the nitrate so all your
silver precipitates out.
I'd weight the precipitate and figure out the yield. You should get a
maximum of 0.81 g of silver carbonate per gram of silver nitrate (if I
did my calculations correctly). I think I'd try making a saturated
sodium carbonate solution, decanting it off any undissolved material,
then adding the silver nitrate to it. Anyone game to calculate how much
solution you need per gram of silver nitrate? I don't have the
solubility constant for sodium carbonate handy. Or if you do it
Michael's way, I'd still want to do a calculation to estimate how much
sodium carbonate to add. ...then again, maybe I'd just try it and see
what I get.
For that matter maybe you could oxidize some silver filings in nitric
acid then neutralize it and precipitate it out with sodium carbonate to
get to the same place.
-- Evan in W. Richland WA who thinks it is really cool that a potter
would consider doing this even if you decide it's too much trouble,
afterall.
Michael Banks wrote:
>
> ----------------------------Original message----------------------------
> Can't say whether silver carb is better than silver nitrate, but you can
> prepare your own silver carbonate by adding sodium carbonate (soda ash) to
> silver nitrate solution. The fairly insoluble silver carbonate is
> precipitated as a pale yellow salt and can be filtered out. Sounds like
> quite a cost saving to make your own..
>
> Michael Banks
> Nelson,
> New Zealand
>
> Angad Vohra wrote,
> I am a potter living in South India. Recently I have been joined by a friend
> who
> likes to work with lustre glazes and we have been using Silver Carbonate.
> Here
> it costs about $35 for 25 gms. if you can get it. However Silver Nitrate
> costs
> around $10 for 25 gms. Question is it better to use Silver carbonate or is
> the
> Nitrate better? Since the nitrate is solouble and also stains everything it
> touches is there a way to convert the nitrate to the carbonate? I hope there
> is
> some one out there with enough knowledge of chemistry who can help me.
> Please
> write direct to me if possible.
> Thanks,
clifford on thu 16 dec 99
Hi Angad
There is an article titled "All that glitters" by Bob Connery in CERAMICS
TECHNICAL magazine no. 7 which should answer all your questions and more.
The article tells you how to make silver salts from raw silver including
silver nitrate, silver chloride and silver carbonate and how to convert
silver nitrate to silver carbonate.
Also how to make gold salts and copper salts plus recipes for reduced
pigment lustre.
the magazine is published in Australia. If you cant get hold of it in India
let me know and i will send you a photocopy of the article. i think you will
find it really useful.
Regards
from another lustre potter -
julianne
Perth Western australia
At 15:03 26/11/99 EST, you wrote:
>----------------------------Original message----------------------------
>------------------
>Hi,
>I am a potter living in South India. Recently I have been joined by a
friend who
>likes to work with lustre glazes and we have been using Silver Carbonate. Here
>it costs about $35 for 25 gms. if you can get it. However Silver Nitrate costs
>around $10 for 25 gms. Question is it better to use Silver carbonate or is the
>Nitrate better? Since the nitrate is solouble and also stains everything it
>touches is there a way to convert the nitrate to the carbonate? I hope there is
>some one out there with enough knowledge of chemistry who can help me. Please
>write direct to me if possible.
>Thanks,
>
>Angad Vohra
>Mantra
>Kottakarai
>Auroville 605 101.
>Tamil Nadu.
>India
>
>Tel: +91 413 622173/622567
>Fax: +91 413 622274
>www.auroville-products.com/
>
>
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