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cmc gum

updated tue 11 oct 05

 

Dan C Tarro on sat 30 aug 97

I need some help with the use of CMC gum. A while back someone on the
list was recommending a paste of CMC mixed in a blender and then added to
a bucket of wet glaze. If someone has the info on this, please forward it
to me directly. I have left the list temporarily for production reasons,
miss the insight, but work demands my time now. Clay is a demanding
task-master.

Thanks in advance.
Dan Tarro
Oak Tree Stoneware
Ham Lake, Mn

oaktreestoneware1@juno.com

David Hendley on sun 31 aug 97

Mix the CMC gum with warm water in the blender.
Not exactly a "paste" consistancy, more like a "cream" consistancy.
Then add to glaze.

At 09:42 AM 8/30/97 EDT, you wrote:
>----------------------------Original message----------------------------
>I need some help with the use of CMC gum. A while back someone on the
>list was recommending a paste of CMC mixed in a blender and then added to
>a bucket of wet glaze. If someone has the info on this, please forward it
>to me directly. I have left the list temporarily for production reasons,
>miss the insight, but work demands my time now. Clay is a demanding
>task-master.
>
>Thanks in advance.
>Dan Tarro
>Oak Tree Stoneware
>Ham Lake, Mn
>
>oaktreestoneware1@juno.com
>
>
David Hendley
Maydelle, Texas
See David Hendley's Pottery Page at
http://www.sosis.com/hendley/david/

Jim Horvitz on sun 31 aug 97

CMC will desolve in cool water better than hot. Dry blend the CMC with clay
or other dry material before adding water it will desolve easier. Jim
Horvitz hjh4blh@aol.com

David Woof on sat 8 oct 05


been using 15 grams CMC to 1 gallon H2o for adding to dry ingredients since
i began potting. In most glazes get good suspension and causes glazes to set
with a durable "skin" on poured and dipped glazes. also overspray this cmc
solution on fragile unforgiving sprayed glazes, followed by a wax resist to
areas i will need to lightly touch while handleing the piece. make up a
bit stronger solution, "to taste", for brushed oxides. 1.5 % bentonite
blended into the dry mix is added suspension insurance for glazes.
Depending on the source, cmc like gums may turn into a tapioca snot unless
disolved hot.
David Woof


peering over the edge, reverently taking an irreverent look at everything.

claybair on sat 8 oct 05


David,
I seem to recall some people having an
issue with CMC turning glaze rancid (baaad smelling).
Do you have this problem & if so do you have a solution?

Gayle Bair
Bainbridge Island, WA
Tucson, AZ
http://claybair.com

-----Original Message-----
From: David Woof

been using 15 grams CMC to 1 gallon H2o for adding to dry ingredients since
i began potting. In most glazes get good suspension and causes glazes to set
with a durable "skin" on poured and dipped glazes. also overspray this cmc
solution on fragile unforgiving sprayed glazes, followed by a wax resist to
areas i will need to lightly touch while handleing the piece. make up a
bit stronger solution, "to taste", for brushed oxides. 1.5 % bentonite
blended into the dry mix is added suspension insurance for glazes.
Depending on the source, cmc like gums may turn into a tapioca snot unless
disolved hot.
David Woof

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Steve Mills on sun 9 oct 05


If I may intrude!

CMC is a long chain organic polymer widely used by the food industry,
derived from wood pulp, and yes it goes *off*.
Bath Potters Supplies (formally part owned by me) make their own Brush-
on glazes with it, and add an antiseptic substance to prolong its shelf
life (a Bactericide). This is very effective.
I would suggest the addition of a small quantity of household
disinfectant.

Steve
Bath
UK


In message , claybair writes
>David,
>I seem to recall some people having an
>issue with CMC turning glaze rancid (baaad smelling).
>Do you have this problem & if so do you have a solution?
>
>Gayle Bair
>Bainbridge Island, WA
>Tucson, AZ
>http://claybair.com
>

--
Steve Mills
Bath
UK

Russel Fouts on sun 9 oct 05


The basic receipe is 15g gum to 500g hot water. Blast it in a blender
(or better with a blender stick) just enough to get the gum dispersed
and let it sit. It will become like Jello. From there you can water
it down to add to glaze, color or to spray over glazes to make a shell.

I'm a converted believer! See the "Ex Voto" I made in thanks for the
intersession.

http://users.skynet.be/russel.fouts/clayart.htm

Ru



Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
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