Llewellyn Kouba on wed 20 dec 00
Readers:
We have some found items here from an old abandoned candle making
room. Mainly are any of these items usable for the Ceramic studio? The
bags are very worn and in most cases can barely read the print and
identification of product. Any idea what they may have been used for?
1. Fuller's Earth (technical Powdered)
2. (Blhoe ? pearl Stearic). light yellowish in color/granular/ can't make
out the first part of the lettering here.
3. A 50# bag just marked (Calcined 16/50). It appears to be a calcined
clay grog to me but calcined what? I would think calcined can cover a
larger area. Quite coarse and as I say looks like a grog to me and might
be usable with a test run. Can't read the chemical manufactuer or companies
any more. Very little markings on the paper bags.
Any input or helps would be appreciated.
Thanks
Llewellyn Kouba
ABBEY POTTERY
http://www.assumptionabbey.com/Pottery
Llewellyn Kouba on thu 21 dec 00
Fuller's earth compares to cat litter. I am surprised that the cats don't
dye from silicosis and getting this stuff in their lungs or not being a
very friendly product for the consumer to work with, although maybe the cat
litter is not so fine a mesh or would not dust up as much. I don't have cat
litter so can't compare the two visually.
Interesting notes to me and always enjoy the learning process from Clayart.
Llewellyn @ Abbey Pottery
At 07:50 AM 12/21/2000 +0000, you wrote:
>Llewellyn Kouba of ABBEY POTTERY asks about Fuller's Earth
>
>It is more or less the same as cat litter.
>The cat litter is comprised of
>Oxide Seger %weight
>K2O 0.13 1.84
>Na2O 0.16 1.51
>CaO 0.21 1.84
>MgO 0.51 3.13
> 1.00 8.33
>
>Al2O3 0.84 13.30
>Fe2O3 0.26 6.48
> 1.10 19.78
>
>SiO2 7.72 71.90
> 7.72 71.90
>
>This cat litter is basically fuller's earth or montmorillonite, the family
>name for the group of minerals which includes bentonite. It acts rather like
>bentonite, but you can blend more of it into a glaze than with pure
>bentonite. I have had a glaze with 50 percent cat litter. Bit of trouble
>sieving it, as it tends to clump, but nothing really difficult.
>
>Martin Howard
>Webb's Cottage Pottery
>Woolpits Road, Great Saling
>BRAINTREE, Essex CM7 5DZ
>England
>martin@webbscottage.co.uk
>
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Martin Howard on thu 21 dec 00
Llewellyn Kouba of ABBEY POTTERY asks about Fuller's Earth
It is more or less the same as cat litter.
The cat litter is comprised of
Oxide Seger %weight
K2O 0.13 1.84
Na2O 0.16 1.51
CaO 0.21 1.84
MgO 0.51 3.13
1.00 8.33
Al2O3 0.84 13.30
Fe2O3 0.26 6.48
1.10 19.78
SiO2 7.72 71.90
7.72 71.90
This cat litter is basically fuller's earth or montmorillonite, the family
name for the group of minerals which includes bentonite. It acts rather like
bentonite, but you can blend more of it into a glaze than with pure
bentonite. I have had a glaze with 50 percent cat litter. Bit of trouble
sieving it, as it tends to clump, but nothing really difficult.
Martin Howard
Webb's Cottage Pottery
Woolpits Road, Great Saling
BRAINTREE, Essex CM7 5DZ
England
martin@webbscottage.co.uk
Snail Scott on fri 22 dec 00
At 08:48 PM 12/21/00 -0800, you wrote:
>Fuller's earth compares to cat litter. I am surprised that the cats don't
>dye from silicosis and getting this stuff in their lungs or not being a
>very friendly product for the consumer to work with, although maybe the cat
>litter is not so fine a mesh or would not dust up as much. I don't have cat
>litter so can't compare the two visually.
>
>Interesting notes to me and always enjoy the learning process from Clayart.
>
>Llewellyn @ Abbey Pottery
Cat litter is processed in into varying mesh sizes,
depending on the brand; typically 2-5 mm or so. The
dust is mainly due to abrasion in shipping and use,
though a feature frequently advertised by the premium
brands is 'less dust' than bargain brands. Presumably
some special process or additive makes the difference.
Cats don't die of silicosis probably because they
only live 15-20 years. Even in their tiny lungs, it
would take the usual time to develop, I would think.
-Snail
Martin Howard on fri 22 dec 00
Llewellyn is right to wonder about the dust and its affect on cats.
Actually, the material comes to us in crumb formation, although there is a
little dust at the bottom of a bag.
When wetted it goes soggy, taking up a lot of liquid, which is in the nature
of bentonite.
So cats and humans dealing with this material do not seem to have problems
of the silicosis type.
However, it may just be that no-one has gone into that question.
I certainly wear a mask when I put the dried cat litter into a liquidiser to
crush it suitable for going through a 120 lawn.
Martin Howard
Webb's Cottage Pottery
Woolpits Road, Great Saling
BRAINTREE, Essex CM7 5DZ
England
martin@webbscottage.co.uk
ferenc jakab on sat 23 dec 00
I am surprised that the cats don't
> dye from silicosis and getting this stuff in their lungs or not being a
> very friendly product for the consumer to work with, although maybe the
cat
Llewellyn,
Cats don't live long enough to get silicosis but aluminium oxide does
wonderful things to their brains!
Feri
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