Carolynn Palmer on tue 4 may 99
Yesterday I visited a "slip cast" commercial pottery that makes the ware
florists use to put their arrangements in. They fire everything to cone 05,
bisque and glaze fire both.
During this visit, the owner showed me his glazing area, with these vats (of
about 8-10 gallon capacity) of glaze they dip the ware in. He asked me if I
mixed my own glazes and and when I said, of course. He said he wanted to
show me his "Magic Solution" for thickening glazes. He stirred up a batch of
glaze and added about 1/2 to 1 cup of a heavy cloudy liquid from a squeeze
bottle, continued stirring and the whole batch of glaze thickened up
instantly for a thicker glaze application to the pieces they were dipping.
Then he said, Ok, now if he wants it to be a thinner coat of glaze for the
remaining pieces, he just stirs in some liquid (which I correctly guessed was
Darvan 7) out of another squeeze bottle and the glaze went back to its
original consistency.
He wouldn't tell me what his "Magic Solution" was, but offered to sell me
some at what I felt was an exhorbitant price.
Any guesses as to what his "Magic Solution" is?
Carolynn Palmer, Somerset Center, Michigan
Joanne Van Bezooyen on wed 5 may 99
CMC solution?
Carolynn Palmer wrote:
> ----------------------------Original message----------------------------
> Yesterday I visited a "slip cast" commercial pottery that makes the ware
> florists use to put their arrangements in. They fire everything to cone 05,
> bisque and glaze fire both.
>
> During this visit, the owner showed me his glazing area, with these vats (of
> about 8-10 gallon capacity) of glaze they dip the ware in. He asked me if I
> mixed my own glazes and and when I said, of course. He said he wanted to
> show me his "Magic Solution" for thickening glazes. He stirred up a batch of
> glaze and added about 1/2 to 1 cup of a heavy cloudy liquid from a squeeze
> bottle, continued stirring and the whole batch of glaze thickened up
> instantly for a thicker glaze application to the pieces they were dipping.
>
> Then he said, Ok, now if he wants it to be a thinner coat of glaze for the
> remaining pieces, he just stirs in some liquid (which I correctly guessed was
> Darvan 7) out of another squeeze bottle and the glaze went back to its
> original consistency.
>
> He wouldn't tell me what his "Magic Solution" was, but offered to sell me
> some at what I felt was an exhorbitant price.
>
> Any guesses as to what his "Magic Solution" is?
>
> Carolynn Palmer, Somerset Center, Michigan
edwin gould on thu 6 may 99
WHAT IS DARVAN 7?
-----Original Message-----
From: Carolynn Palmer
To: CLAYART@LSV.UKY.EDU
Date: Tuesday, May 04, 1999 5:15 PM
Subject: A mystery/Glaze thickness/"Magic"
>----------------------------Original message----------------------------
>Yesterday I visited a "slip cast" commercial pottery that makes the ware
>florists use to put their arrangements in. They fire everything to cone 05,
>bisque and glaze fire both.
>
>During this visit, the owner showed me his glazing area, with these vats
(of
>about 8-10 gallon capacity) of glaze they dip the ware in. He asked me if
I
>mixed my own glazes and and when I said, of course. He said he wanted to
>show me his "Magic Solution" for thickening glazes. He stirred up a batch
of
>glaze and added about 1/2 to 1 cup of a heavy cloudy liquid from a squeeze
>bottle, continued stirring and the whole batch of glaze thickened up
>instantly for a thicker glaze application to the pieces they were dipping.
>
>Then he said, Ok, now if he wants it to be a thinner coat of glaze for the
>remaining pieces, he just stirs in some liquid (which I correctly guessed
was
>Darvan 7) out of another squeeze bottle and the glaze went back to its
>original consistency.
>
>He wouldn't tell me what his "Magic Solution" was, but offered to sell me
>some at what I felt was an exhorbitant price.
>
>Any guesses as to what his "Magic Solution" is?
>
>Carolynn Palmer, Somerset Center, Michigan
>
Bonnie Staffel on thu 6 may 99
May 6, 1999
Dear Carolynm.
My guess is that it was a dissolved mixture of CMC. I used to make this
solution of about 1/4 cup of CMC to one quart of hot water in a
blender. I added the water to the blender first, then the CMC slowly
sprinkled in while the blender was operating at top speed. Pretty soon
I had a nice syrupy liquid about the consistency of honey. I would add
a portion of it to my glaze and it would thicken up, then add more if I
wanted it to be thinner. In my use, I did not see any advantage to it
being thicker so always tried to get it deflocculated. I now add the
dry CMC to another dry ingredient to be added to make a glaze batch,
stirring it to disperse it, then after adding all the dry ingredients to
the hot water, would sieve the whole thing. The CMC is added to keep
the materials from settling and also to give me a tough glaze coat.
Bonnie Staffel, Charlevoix, MI
Ian Dunbar on fri 7 may 99
Hello All,
Joanne, I have raw glazed, once fired terracotta restaurant ware for about
7 years and initially had problems with glaze sedimentation and uneven
application. I can't remember who told me about this but I was persuaded to
add small amounts of fabric softener to the glaze. It works just as your
"Magic" Solution did. Haven't figured out why and the local manufacturer
won't divulge the contents.
Plus point: your glaze will smell great; the product is mildly scented.
Minus point: if you put too much softener in it will tend to foam very
slightly if the glaze surface is agitated.
Regards
Ian Dunbar
Kilncraft Pottery & Gallery
Lynedoch
Cape Province, South Africa.
-----Original Message-----
From: Joanne Van Bezooyen [SMTP:joannevb@azstarnet.com]
Sent: 05 May 1999 07:52
To: CLAYART@LSV.UKY.EDU
Subject: Re: A mystery/Glaze thickness/"Magic"
----------------------------Original message----------------------------
CMC solution?
Carolynn Palmer wrote:
> ----------------------------Original message----------------------------
> Yesterday I visited a "slip cast" commercial pottery that makes the ware
> florists use to put their arrangements in. They fire everything to cone
05,
> bisque and glaze fire both.
>
> During this visit, the owner showed me his glazing area, with these vats
(of
> about 8-10 gallon capacity) of glaze they dip the ware in. He asked me
if I
> mixed my own glazes and and when I said, of course. He said he wanted to
> show me his "Magic Solution" for thickening glazes. He stirred up a
batch of
> glaze and added about 1/2 to 1 cup of a heavy cloudy liquid from a
squeeze
> bottle, continued stirring and the whole batch of glaze thickened up
> instantly for a thicker glaze application to the pieces they were
dipping.
>
> Then he said, Ok, now if he wants it to be a thinner coat of glaze for
the
> remaining pieces, he just stirs in some liquid (which I correctly guessed
was
> Darvan 7) out of another squeeze bottle and the glaze went back to its
> original consistency.
>
> He wouldn't tell me what his "Magic Solution" was, but offered to sell me
> some at what I felt was an exhorbitant price.
>
> Any guesses as to what his "Magic Solution" is?
>
> Carolynn Palmer, Somerset Center, Michigan
Kim Marie on fri 7 may 99
May instructor used to use epsom salts to thicken glazes
Kim
At 01:51 PM 5/5/99 EDT, you wrote:
>----------------------------Original message----------------------------
>CMC solution?
>
>Carolynn Palmer wrote:
>
>> ----------------------------Original message----------------------------
>> Yesterday I visited a "slip cast" commercial pottery that makes the ware
>> florists use to put their arrangements in. They fire everything to cone 05,
>> bisque and glaze fire both.
>>
>> During this visit, the owner showed me his glazing area, with these vats
(of
>> about 8-10 gallon capacity) of glaze they dip the ware in. He asked me
if I
>> mixed my own glazes and and when I said, of course. He said he wanted to
>> show me his "Magic Solution" for thickening glazes. He stirred up a
batch of
>> glaze and added about 1/2 to 1 cup of a heavy cloudy liquid from a squeeze
>> bottle, continued stirring and the whole batch of glaze thickened up
>> instantly for a thicker glaze application to the pieces they were dipping.
>>
>> Then he said, Ok, now if he wants it to be a thinner coat of glaze for the
>> remaining pieces, he just stirs in some liquid (which I correctly
guessed was
>> Darvan 7) out of another squeeze bottle and the glaze went back to its
>> original consistency.
>>
>> He wouldn't tell me what his "Magic Solution" was, but offered to sell me
>> some at what I felt was an exhorbitant price.
>>
>> Any guesses as to what his "Magic Solution" is?
>>
>> Carolynn Palmer, Somerset Center, Michigan
>
>
Tom Wirt on sat 8 may 99
Carolyn
Don't know what you've gotten off line, but from the sound of thickening,
then thinning, he put in a flocculant first to thicken it up, then put in
Darvan 7 (deflocculant) to thin it back out. The flocculant could have been
just about any acid or one of the synthetics like "flocs (available at many
pottery supply houses) or the latex additives. This material acts to
change the ionic charge of the particles in the slip to make them cling
together, making the slip appear to be thick. The Darvan reverses this
process and makes it appear thin again. For drill, you can try this on any
glaze using Epsom salts or vinegar to thicken, and Darvan or soda ash to
thin.
Tom Wirt
| |
|
