ASHPOTS@AOL.COM on wed 23 jan 02
i have a recipe Nepsy 50 Magnesium Carb 50
has any one used it ????? I would like to have a crackle under my ash glaze
any info would be apreciated
its so lonely now that Dave is gone
Richard Aerni on wed 23 jan 02
Don't know about that recipe...I do know that Magnesium Carb is pretty hard
to work with. It is really fluffy and takes some doing to get it into a
good mix in the wet glaze.
Another possible approach to getting crackle under your ash would be to work
with a slip that has a high shrinkage rate, so that it would do the cracking
and the ash could fill in around it all.
Just a thought...
----- Original Message -----
Sent: Wednesday, January 23, 2002 4:48 PM
Subject: Re: Crackle Cone 10???????
> i have a recipe Nepsy 50 Magnesium Carb 50
> has any one used it ????? I would like to have a crackle under my ash
> any info would be apreciated
> its so lonely now that Dave is gone
william schran on thu 24 jan 02
Capt Mark - "50% Neph. Sy. & Mag. Carb. 50%" - I seem to remember
this was a Robert Sperry type "separating" slip that is applied over
a glaze fired surface, fired again, to get the broken white slip
surface. I think I did this at cone 6.
clennell on thu 24 jan 02
Sour Cherry Pottery
> Capt Mark - "50% Neph. Sy. & Mag. Carb. 50%" - I seem to remember
> this was a Robert Sperry type "separating" slip that is applied over
> a glaze fired surface, fired again, to get the broken white slip
> surface. I think I did this at cone 6.
Capt Mark: this is a good cone 10 crackle slip. I use it on bisque. You
can watch it crackle in front of your eyes. If it hasn't crackled enough
pour some more on. I use it over a black slip for ART or under a shino for
a different kind of art.
sometimes i'm just a pottery ho. Is that spelt right chris c???????
Tony and Sheila Clennell
Sour Cherry Pottery
4545 King Street
CANADA L0R 1B1
Lalitha Kommajosyula on thu 24 jan 02
Funny you should ask. I was experimenting with the exact same thing last
week. I made a slip with 50-50 nephsy-mag. carb. I applied the slip with a
brush on bisqued stoneware. I got a nice crackle pattern when the slip
dried. I dipped it in a shino glaze and red. fired to cone 10.
The glaze ran (it normally does not) and dragged the slip with it, so i was
left with clumps of crackle slip and bare spots.
Same result with 40-60 nephsy-mag carb. The parts that i did not glaze
came out with the crackle slip looking nice though.
I don't know if I would have had better luck applying the slip on leather-
hard clay or maybe thinning it down a little bit.
Let me know if you find a recipe that works for you.
On Wed, 23 Jan 2002 16:48:29 EST, ASHPOTS@AOL.COM wrote:
>i have a recipe Nepsy 50 Magnesium Carb 50
>has any one used it ????? I would like to have a crackle under my ash
>any info would be apreciated
>its so lonely now that Dave is gone
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Alisa og Claus Clausen on fri 25 jan 02
Dear Capt. Mark,
I have added up to 50% Mag. Carb. to any glaze, to get it bawl and
crawl...as suggested from Ababi,
From 40% up, it balled a lot, crawled less. Do not know about the neph.
sye. part, and I fire only to cone 6.
This is like, no help!!?
regards from Alisa in Denmark
ASHPOTS@AOL.COM on fri 25 jan 02
Ok i am going to try it on damp green ware. i made some small plates. i am
going to brush on 2 plates this morning then try it on 2 bisque plates.
i guess it works for some and not with others