Jeff Lawrence on fri 4 oct 96
Hello,
A silversmith acquaintance wanted me to make him some ingot molds and
possibly a crucible. I know I read a crucible recipe in a book by Conrad, a
compendium of recipes, and even bought some graphite to try one out. Now I
can't find the book, though.
If anybody has a copy on their shelf, I'd really appreciate his recipes. Or
any body recipes for crucibles or hot metal molds.
Thanks in advance!
Jeff Lawrence
jml@sundagger.com
Sun Dagger Design, Route 1 Box 394L, Espanola NM 87532
vox/fax: 505-753-5913
"not infrequently wrong, but seldom in doubt."
Andrew S Lubow on fri 4 oct 96
I saw one a couple of months ago a Behrens' formula I think
Epk 40
Calcined Kaolin 20
Tennessee Ball Clay (OM #1) 20
Grog 10
Flint
mix with about 500ML of water per 1000 grams mix. After an initial
wetting period of about 24 hours allow to mature for a week before
wedging and throwing. Fire to Cone 4 or higher
There's another way to go with the help of your friend.
You'll need to get investment from him. Then mold a lump of clay into a
mound. This will shape the bowl of the crucible. Set the lump onto a
smooth surface and build a wall around it with clay. Mix the investment
in a ratio of 38-40 parts of water to every 100 parts of powder by
weight. Then stir in 1/3 to 1/2 as much pumice as there is investment.
Pour the mix into the form. Vibrate it to remove air bubbles. Let it set
up overnight then fire it to 600 degrees Fahrenheight. Let it cool slowly
in the air.
On Fri, 4 Oct 1996 08:49:23 EDT Jeff Lawrence
writes:
>----------------------------Original
>message----------------------------
>Hello,
>
>A silversmith acquaintance wanted me to make him some ingot molds and
>possibly a crucible. I know I read a crucible recipe in a book by
>Conrad, a
>compendium of recipes, and even bought some graphite to try one out.
>Now I
>can't find the book, though.
>
>If anybody has a copy on their shelf, I'd really appreciate his
>recipes. Or
>any body recipes for crucibles or hot metal molds.
>
>Thanks in advance!
>Jeff Lawrence
>jml@sundagger.com
>Sun Dagger Design, Route 1 Box 394L, Espanola NM 87532
>vox/fax: 505-753-5913
>"not infrequently wrong, but seldom in doubt."
>
Andrew S Lubow on sat 5 oct 96
The missing percentage for the flint is 10%
On Fri, 4 Oct 1996 21:55:49 EDT Andrew S Lubow
writes:
>----------------------------Original
>message----------------------------
>I saw one a couple of months ago a Behrens' formula I think
>
>Epk 40
>Calcined Kaolin 20
>Tennessee Ball Clay (OM #1) 20
>Grog 10
>Flint
>
>mix with about 500ML of water per 1000 grams mix. After an initial
>wetting period of about 24 hours allow to mature for a week before
>wedging and throwing. Fire to Cone 4 or higher
>
>There's another way to go with the help of your friend.
> You'll need to get investment from him. Then mold a lump of clay into
>a
>mound. This will shape the bowl of the crucible. Set the lump onto a
>smooth surface and build a wall around it with clay. Mix the
>investment
>in a ratio of 38-40 parts of water to every 100 parts of powder by
>weight. Then stir in 1/3 to 1/2 as much pumice as there is investment.
>Pour the mix into the form. Vibrate it to remove air bubbles. Let it
>set
>up overnight then fire it to 600 degrees Fahrenheight. Let it cool
>slowly
>in the air.
>
>On Fri, 4 Oct 1996 08:49:23 EDT Jeff Lawrence
>writes:
>>----------------------------Original
>>message----------------------------
>>Hello,
>>
>>A silversmith acquaintance wanted me to make him some ingot molds and
>>possibly a crucible. I know I read a crucible recipe in a book by
>>Conrad, a
>>compendium of recipes, and even bought some graphite to try one out.
>>Now I
>>can't find the book, though.
>>
>>If anybody has a copy on their shelf, I'd really appreciate his
>>recipes. Or
>>any body recipes for crucibles or hot metal molds.
>>
>>Thanks in advance!
>>Jeff Lawrence
>>jml@sundagger.com
>>Sun Dagger Design, Route 1 Box 394L, Espanola NM 87532
>>vox/fax: 505-753-5913
>>"not infrequently wrong, but seldom in doubt."
>>
>
| |
|
