Marni Turkel on tue 2 jul 02
A few years ago I was told that hot water can seriously decrease the
effectiveness of CMC. That was from someone who had worked in the
technical end of the ceramics industry.
--
Marni Turkel
Stony Point Ceramic Design
2080 Llano Rd 1B
Santa Rosa, CA 95407
Phone: 707-579-5567
Fax: 707-579-1116
http://www.marniturkel.com
MOLINA, RAFAEL on tue 2 jul 02
I am trying to prepare a CMC Gum solution for applying over a glaze to =
make it less porous so that overglaze stain decoration can be applied =
easier. The trouble is I haven't done this in many years and can't =
quite remember the process. I vaguely remember sifting the gum into a =
blender filled with hot water, blending, and the allowing the solution =
to sit overnight before using.
Does anyone on the List have more info on preparing this material? In =
particular the amount of gum to water. TIA.
Rafael Enrique
Rafael Molina, MFA
Assistant Professor of Art
Department of Music, Art, and Dance
Tarrant County College-Southeast Campus
2100 Southeast Parkway
Arlington, TX 76018-3144
(817) 515-3711
(817) 515-3189 fax
Susan on tue 2 jul 02
Hi Rafael,
I got this out of a ceramic book:
CMC: (use as 1/3 water content)
1 gallon water to 130.66 grams CMC
1 Pint water to 16.33 grams CMC
WAIT 24 HOURS
this ratio works for me.
Susan
> From: "MOLINA, RAFAEL"
> Reply-To: Ceramic Arts Discussion List
> Date: Tue, 2 Jul 2002 17:47:52 -0500
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: CMC Gum prep?
>
> I am trying to prepare a CMC Gum solution for applying over a glaze to make it
> less porous so that overglaze stain decoration can be applied easier. The
> trouble is I haven't done this in many years and can't quite remember the
> process. I vaguely remember sifting the gum into a blender filled with hot
> water, blending, and the allowing the solution to sit overnight before using.
>
> Does anyone on the List have more info on preparing this material? In
> particular the amount of gum to water. TIA.
>
> Rafael Enrique
>
>
> Rafael Molina, MFA
> Assistant Professor of Art
> Department of Music, Art, and Dance
> Tarrant County College-Southeast Campus
> 2100 Southeast Parkway
> Arlington, TX 76018-3144
> (817) 515-3711
> (817) 515-3189 fax
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
Ababi on wed 3 jul 02
Hello Rafael
This is how I do it:
I boil water. 2 liters.
the plastic jar of the 100 grams of CMC the way I buy it I make to small holes.
II pour the CMC slowly while mixing with a drill with a mixer.
The solution: is 1 CMC 20 water.
when I have to add 1 gram of CMC I add 20 of the solution. In some cases I add a
spoon or so without high math.
People usually add it before sieving, most of my glazes I do not sieve, or better I try to
rebuild them I decrease feldspar add frit and increase the kaolin to get better
suspension
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
---------- Original Message ----------
>I am trying to prepare a CMC Gum solution for applying over a glaze to make it less
porous so
>that overglaze stain decoration can be applied easier. The trouble is I haven't done
this in
>many years and can't quite remember the process. I vaguely remember sifting the
gum into
>a blender filled with hot water, blending, and the allowing the solution to sit overnight
before
>using.
>Does anyone on the List have more info on preparing this material? In particular the
amount
>of gum to water. TIA.
>Rafael Enrique
>Rafael Molina, MFA
>Assistant Professor of Art
>Department of Music, Art, and Dance
>Tarrant County College-Southeast Campus
>2100 Southeast Parkway
>Arlington, TX 76018-3144
>(817) 515-3711
>(817) 515-3189 fax
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
Steve Mills on wed 3 jul 02
Rafael,
This might be of interest to you: a long established technique used by
Majolica Painters is to add a dessert spoon of sugar to one Gallon of
the glaze mix (I'm talking UK here but I don't think it's critical). On
drying on the pot the dissolved sugar migrates to the surface of the
glaze, giving it a crisp hard coat which is ideal to paint on.
Steve
Bath
UK
In message , MOLINA, RAFAEL writes
>I am trying to prepare a CMC Gum solution for applying over a glaze to =3D
>make it less porous so that overglaze stain decoration can be applied =3D
>easier. The trouble is I haven't done this in many years and can't =3D
>quite remember the process. I vaguely remember sifting the gum into a =3D
>blender filled with hot water, blending, and the allowing the solution =3D
>to sit overnight before using.
>
>Does anyone on the List have more info on preparing this material? In =3D
>particular the amount of gum to water. TIA.
>
>Rafael Enrique
>
>
>Rafael Molina, MFA
>Assistant Professor of Art
>Department of Music, Art, and Dance
>Tarrant County College-Southeast Campus
>2100 Southeast Parkway
>Arlington, TX 76018-3144
>(817) 515-3711
>(817) 515-3189 fax
--
Steve Mills
Bath
UK
Des & Jan Howard on thu 4 jul 02
Rafael
We make up a CMC solution about PVA woodworking glue consistency.
Take a 2 litre plastic juice container, add 30 gm CMC powder,
add 200 ml hot water, shake until dispersed, (note: dispersed,
not dissolved), make up to 2 litres with cold water, keep shaking to taste.
Des
Caution... I once made up a batch using an old juice container,
didn't notice the container had become sun brittled,
sat down to watch TV news & shake container.
Container disintegrated, 2 litres very, very sticky gum all over me,
lounge chair, floor ( fortunately cork tiles), wall, what a mess!
Jan laughed herself helpless at my dripping glasses & whiskers !!
"MOLINA, RAFAEL" wrote:
> I am trying to prepare a CMC Gum solution for applying over a glaze to make it less porous so that overglaze stain decoration can be applied easier. The trouble is I haven't done this in many years and can't quite remember the process. I vaguely remember sifting the gum into a blender filled with hot water, blending, and the allowing the solution to sit overnight before using.
>
> Does anyone on the List have more info on preparing this material? In particular the amount of gum to water. TIA.
--
Des & Jan Howard
Lue Pottery
LUE NSW 2850
Australia
Ph/Fax 02 6373 6419
http://www.luepottery.hwy.com.au
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