[Clayart] Replacing bentonite

[David Woof]

Hi Mary,
Several of us now have responded to Jeremy's request for information re replacing Bentonite.
I would consider it right and proper to hear back from him as to how his concerns are being resolved.

Of course I'm not losing sleep, but the question has flitted through my musings that a growing number of folks may be not familiar with the long-time spirit of the traditional Clayart forum where unpaid experienced potters and studio artists give well considered information to those asking because of our dedication to the Craft.

It is appreciated when the inquiring person responds to the conversation with a thank you, a request for further clarification, or of a sharing of their experience, which then is a return benefit for all.

This goes to the spirit of Clayart that we are all here as students as well as teachers.

In this way the learning experience of the Craft accumulates and never ceases as many continue to support the appreciation of Clayart value that keeps this valuable resource alive.

Misneach,

David Woof...............................................................................................................................................................
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________________________________
From: Clayart <clayart-bounces at lists.clayartforum.com> on behalf of Mary Winter via Clayart <clayart at lists.clayartforum.com>
Sent: Tuesday, August 20, 2024 7:30 PM
To: Clayart international pottery discussion forum <clayart at lists.clayartforum.com>
Cc: Mary Winter <mary8252 at gmail.com>
Subject: Re: [Clayart] Replacing bentonite

Jeremy you can get 5 pounds of bentonite from US Pigment for $10. You might
consider this.

Mary

On Tue, Aug 20, 2024 at 8:26 PM David Woof via Clayart <
clayart at lists.clayartforum.com> wrote:

> Hi Jeremy,
> You asked for a replacement for Bentonite.  Perhaps we assumed you knew
> the mineral qualities of the materials you have available to know you could
> not just whip up a batch of what Bentonite could be replaced with.  So our
> answers asked you to discern that there is no simple one material
> substitute.
> Macaloid and Bentonites are unique materials that cannot be substituted
> singly or in combinations of raw materials you would likely have.  This
> also requires understanding the intrinsic characters of each mineral and
> the combination effects involved.
>
> We could have no doubt wasted your time telling you to take a high
> plasticity synthesized Ball clay, reduce the original recipe amounts of
> feldspar and silica and adjust the recipe ratios to accommodate these
> additions back to the original Empirical.
>
> Then add enough CMC gum as a physical "mechanical" suspender, adequate
> Hopefulness, and Sodium Silicate to deflocculate the glaze slop.    Then if
> you've worked the Math correctly to arrive at a workable materials ratio...
> you would still have to learn how to apply a deflocculated glaze slop
> because the slop rheology will be way off of what most potters who use
> flocculated glaze slops are familiar with.
> And no doubt you would lose the Kuan Crackle glaze effect because you have
> created a new Glaze. which might be an attractive glaze but not Kuan you'd
> hoped for.
> So If I gave you the adjusted amounts for this substitution most likely
> the results wouldn't please.
>
> ********So back to Bentonite or Macaloid.
>
> Misneach,
>
> David
> Woof.....................................................................................................................................................................
>
> ****************************************************************************************************.
> ________________________________
> From: Clayart <clayart-bounces at lists.clayartforum.com> on behalf of
> Jeremy Keala Ceramics via Clayart <clayart at lists.clayartforum.com>
> Sent: Friday, August 16, 2024 10:17 AM
> To: clayart at lists.clayartforum.com <clayart at lists.clayartforum.com>
> Cc: Jeremy Keala Ceramics <jeremy.keala.ceramics at gmail.com>
> Subject: [Clayart] Replacing bentonite
>
> Hello,
>
> I’m starting to work on creating a Kuan crackle glaze. My starting recipes
> have bentonite in them and I don’t currently don’t have bentonite in my
> workshop and would like to keep it that way otherwise I just keep adding
> new materials all the time to my list of raw materials.
> Would you have any suggestions how to go about replacing bentonite in a
> glaze ?
> Thanks and all the best,
> Jeremy
>
>
> --
> *Jeremy Keala Ceramics*
> www.jeremykeala.com<http://www.jeremykeala.com>
> Instagram : @jeremy_keala_ceramics
> <https://www.instagram.com/jeremy_keala_ceramics/>
> +33 (0)6 59 96 92 54
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