Carol Seidman on wed 31 mar 99
A friend gave me three cartons of old glaze chemicals which are probably
twenty five years old. It contained some treasures ( 1 lb. cobalt oxide
black) and several nasty ones. Every item was carefully labeled, in
plastic bags stored in individual metal tobacco cans. I called my local
recycling center to find the proper way to dispose of the white lead. I
want to pass along the information to the group.
My local recycling center referred me to the county office since
she was not familar with this material. The county person is sending me
the schedule for their bi-monthly "HAZARDOUS MATERIALS COLLECTION DAY".
They have contractors to handle all the materials not appropriate for
the landfills. Just bring it in, Thats it! Spring cleaning made easy.
Now I have some items that I need help with:
Black Cobalt Oxide, how is this different from the currently
available cobalt material?
Kingman Feldspar, is this a soda or potash feldspar. TIA
Carol Seidman New Jersey cseidman@home.com
Mason Batchelder on thu 1 apr 99
kingman feldspar is a high potash feldspar.wish I had some had lot of glazes
for that one!
Alex Wilson on thu 1 apr 99
Och Carol, I just wish you were closer to my location than you are, as I'd be
quite happy to take the lead oxide off your hands! As it is, I can only
encourage you to take the tiger by its tail and run some tests using these
potentially rewarding oxides/materials.
You know these so-called deadly materials, used with care and a modicum of
sense, are no more dangerous to yourself than a carelessly wielded claw-hammer
or utility knife.
Oh, and your 'black cobalt', is plain old cobalt oxide which should last you a
fair while if used sparingly.
Away out and get some earthenware clay and make some 'old' pots, and don't use
a computer to work out what the glazes will look like aforehand. Spoils the
fun and besides, you won't be selling them anyway.
TTFN
Alex in Iowa, seriously thinking of starting an endangered species
organisation to promote the use of lead in glazes. Do I need psychiatric help?
Michael Banks on fri 2 apr 99
Hi Carol,
In case no one's commented on Kingman feldspar, it's a discontinued potash
feldspar from Kingman Arizona, I believe. It is reputed to contain 12.0%
potash, 2.7% soda, 0.3% calcia and only 0.08 ferric iron. It should fire as
white as Custer but has a bit more potash and a bit less silica which will
give it slightly more fluxing power.
Michael Banks,
a long way from Kingman,
Nelson,
New Zealand
>----------------------------Original message----------------------------
>A friend gave me three cartons of old glaze chemicals which are probably
>twenty five years old. It contained ....(snip)..Kingman Feldspar, is this a
soda or potash feldspar. TIA
>Carol Seidman New Jersey cseidman@home.com
Ron Roy on mon 5 apr 99
Well Alex - I'm not sure if you need psychiatric help - I choose to think
you are just pushing bottons.
But if you are serious when you say "You know these so-called deadly
materials, used with care and a modicum of sense, are no more dangerous to
yourself than a carelessly wielded claw-hammer or utility knife" -
If you mean to the potter - it will take more than care and good sense to
deal with lead - if you mean be able to make glazes that stay under the
permissable limits - show me if you can - I'll pay for the testing.
RR
>----------------------------Original message----------------------------
>Och Carol, I just wish you were closer to my location than you are, as I'd be
>quite happy to take the lead oxide off your hands! As it is, I can only
>encourage you to take the tiger by its tail and run some tests using these
>potentially rewarding oxides/materials.
>You know these so-called deadly materials, used with care and a modicum of
>sense, are no more dangerous to yourself than a carelessly wielded claw-hammer
>or utility knife.
>Oh, and your 'black cobalt', is plain old cobalt oxide which should last you a
>fair while if used sparingly.
>Away out and get some earthenware clay and make some 'old' pots, and don't use
>a computer to work out what the glazes will look like aforehand. Spoils the
>fun and besides, you won't be selling them anyway.
>TTFN
>
>Alex in Iowa, seriously thinking of starting an endangered species
>organisation to promote the use of lead in glazes. Do I need psychiatric help?
Ron Roy
93 Pegasus Trail
Scarborough, Ontario
Canada M1G 3N8
Tel: 416-439-2621
Fax: 416-438-7849
Web page: http://digitalfire.com/education/people/ronroy.htm
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