William C. Melcher on tue 2 apr 96
Hi all: Robin Hopper in one of his very fine tapes recommends Darvan 7 , afew
drops in your water. It's slick, it works and I love it.
Bill in Tucson, AZ
peter pinnell on tue 2 apr 96
This may work in some instances, but I would be wary of it. Darvan is a
strong deflocculant, and if you get very much of it in plastic clay,
it(the clay) will become thixotropic (rubbery) and will not want to stand.
It may not be a problem with new clay, but with the clay that you mix (or
re-cycle) that contains Darvan from throwing slop.
Clays that contain a lot of free Ca and Mg ions (such as some stonewares)
will not be effected as much as cleaner clays such as porcelain.
The cellulose gums mentioned in a previous post can also have unexpected
side effects. Some, such as CMC, can also have a deflocculatory effect.
In addition, they cannot be used with a clay that contains Vee Gum T as a
plasticiser, as the combination of cmc (or other cellulose gums) and
Vee Gum destroys plasticity. I know this sound strange, since there is a
product marketed (Vee Gum Cer) that is a combination of the two. I can
only assume that it is intended for glazes only.
The one other potential problem is that cellulose gums spoil in the clay,
and with time will develope an amazingly pungent odor, not unlike vomit. You
will not be popular in group studios if your clay and/or slop smells that
way.
Not to be a spoilsport...
Pete Pinnell
On Tue, 2
Apr 1996, William C. Melcher wrote:
> ----------------------------Original message----------------------------
> Hi all: Robin Hopper in one of his very fine tapes recommends Darvan 7 , afew
> drops in your water. It's slick, it works and I love it.
>
> Bill in Tucson, AZ
>
Rod Wuetherick on tue 2 apr 96
Hi Bill,
Great idea! I use "Darvan 7" and Viniger in my thick slips (for attaching) in
been told on more than one occasion that "Darvan was not intented for that purpo
Is there a reason why I should not use "Darvan 7" in this fashion? Anybody?
Cheers,
Rod Wuetherick in Calgary, AB It chinooking like crazy... One can tell in Calgar
huge seething cloud of pollution being held in place by that warm chinook wind.
----------
From: William C. Melcher[SMTP:74001.3712@compuserve.com]
Sent: Tuesday, April 02, 1996 4:34 AM
To: Multiple recipients of list CLAYART
Subject: Re: Slick stuff for throwing
----------------------------Original message----------------------------
Hi all: Robin Hopper in one of his very fine tapes recommends Darvan 7 , a few
drops in your water. It's slick, it works and I love it.
Bill in Tucson, AZ
Charles Gaudi on wed 3 apr 96
Hi,
What is "DARVAN 7" and whereis it available?
charlie in Florida
>----------------------------Original message----------------------------
>Hi all: Robin Hopper in one of his very fine tapes recommends Darvan 7 , afew
>drops in your water. It's slick, it works and I love it.
>
>Bill in Tucson, AZ
>
>
Russel Fouts on thu 4 apr 96
CyberSlickers,
>> Hi all: Robin Hopper in one of his very fine tapes recommends Darvan 7, a
few drops in your water. It's slick, it works and I love it. <<
I'm sorry but I can resist no longer.
In a previous discussion about throwing porcelain someone suggested using KY
jelly!
Russel (actually, I'm not sorry ;-)
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* Russel Fouts, CI$: 100021,23,
Bruxelles, Belgium
Internet: 100021.23@CompuServe.Com
"Eat your dessert first, life is too uncertain!"
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