Jo Gilder on mon 1 sep 97
Could someone please tell me what this is? I understand what it's
supposed to do but I don't know where I can find it. Can I buy it in a
grocery store (liquid starch), a pharmacy (Darvan) or do I have to go to
a clay supply distributor(Sodium Silicate)? Are there common everyday
things that I can use that have the same properties?
Jo
Nils Lou on tue 2 sep 97
Household lye works as a defloc. NL
On Mon, 1 Sep 1997, Jo Gilder wrote:
> ----------------------------Original message----------------------------
> Could someone please tell me what this is? I understand what it's
> supposed to do but I don't know where I can find it. Can I buy it in a
> grocery store (liquid starch), a pharmacy (Darvan) or do I have to go to
> a clay supply distributor(Sodium Silicate)? Are there common everyday
> things that I can use that have the same properties?
>
> Jo
>
Andrew & Laura Conley on tue 2 sep 97
Vinegar is sometimes used as a deflocculant - plain old white vinegar.
Jo Gilder wrote:
>
> ----------------------------Original message----------------------------
> Could someone please tell me what this is? I understand what it's
> supposed to do but I don't know where I can find it. Can I buy it in a
> grocery store (liquid starch), a pharmacy (Darvan) or do I have to go to
> a clay supply distributor(Sodium Silicate)? Are there common everyday
> things that I can use that have the same properties?
>
> Jo
Vince Pitelka on wed 3 sep 97
At 06:46 AM 9/2/97 -0400, you wrote:
>----------------------------Original message----------------------------
>Vinegar is sometimes used as a deflocculant - plain old white vinegar.
This is misleading. Vinegar is acidic, and therefore will not act as a
deflocculant. Someone with more chemistry savvy, of which there are plenty
on this list, can explain it better, but my understanding is that the
deflocculants are all alkaline, and introduce like electrical charges to the
particles in suspension, causing the particles to repel one another and
remain in liquid suspension with less water content. An acidic material
will introduce opposite electrical charges, causing the particles to "flock"
together. This will thicken a given glaze or slip which may have been
slightly alkaline before deflocculation, and thus may well reduce settling,
but in a thinner mixture it will increase settling.
- Vince
Vince Pitelka - vpitelka@DeKalb.net
Home 615/597-5376, work 615/597-6801, fax 615/597-6803
Appalachian Center for Crafts
1560 Craft Center Drive, Smithville TN 37166
| |
|
