William & Susan Schran User on tue 1 apr 08
In my studio, a plaster wedging/reclaiming board set into wood frame.
Poured the plaster back in the 1980's
Has served me well, but starting the deteriorate at the edges.
Will replace when I "get a round toit"
In the meantime - the fuzzy salts that migrates to the surface - what is it?
I have begun to collect it and plan to apply to the surface of a freshly
glazed pot, then fire. Any thoughts on reactions/results?
Original plaster was #1 pottery plaster.
If I continue to use for wedging & reclaiming slurry, should I use same?
Thanks, Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Susan Fox Hirschmann on tue 1 apr 08
In a message dated 4/1/2008 2:40:17 PM Eastern Daylight Time, wschran@COX.NET
writes:
In the meantime - the fuzzy salts that migrates to the surface - what is it?
I have begun to collect it and plan to apply to the surface of a freshly
glazed pot, then fire. Any thoughts on reactions/results?
Cool idea! I usually just scrape it down and toss it. Maybe now I will save
it all?
Let me know your results, please.
Enjoyed meeting you at NCECA. Finally.
Warm regards,
Susan
Annandale, VA
**************Create a Home Theater Like the Pros. Watch the video on AOL
Home.
(http://home.aol.com/diy/home-improvement-eric-stromer?video=15&ncid=aolhom00030000000001)
Nobody Special on tue 1 apr 08
On Tue, 1 Apr 2008 13:51:40 -0400, William & Susan Schran User
wrote:
>In my studio, a plaster wedging/reclaiming board set into wood frame.
---snip---
- the fuzzy salts that migrates to the surface - what is it?
>
Bill...
I am not a chemist, but I believe you will find that the fuzz is merely
calcium. What you describe is called "secondary efflorescence". It is
caused by acidic water from the clay dissolving the plaster, which is
calcium sulfate. As the water subsequently evaporates from the plaster, the
formerly dissolved calcium crystallizes out on the surface of the slab as
white fuzz.
...James
Eleanora Eden on tue 1 apr 08
Hi Bill,
I only see that stuff when molds stay damp too long. Reminds me of a project
I did once to make a "mud flat". Mixed equal parts clay, ash, and dirt. The stuff
that grew off that was amazing.
We'll all be interested to know what your fuzzies produce on a glazed pot.
Eleanora
>In my studio, a plaster wedging/reclaiming board set into wood frame.
>Poured the plaster back in the 1980's
>Has served me well, but starting the deteriorate at the edges.
>Will replace when I "get a round toit"
>
>In the meantime - the fuzzy salts that migrates to the surface - what is it?
>
>I have begun to collect it and plan to apply to the surface of a freshly
>glazed pot, then fire. Any thoughts on reactions/results?
>
>Original plaster was #1 pottery plaster.
>If I continue to use for wedging & reclaiming slurry, should I use same?
>
>Thanks, Bill
>
>--
>William "Bill" Schran
>wschran@cox.net
>wschran@nvcc.edu
>http://www.creativecreekartisans.com
>
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--
Bellows Falls Vermont
www.eleanoraeden.com
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