search  current discussion  categories  glazes - chemistry 

glaze viscosity, top to bottom of bucket

updated thu 21 oct 99

 

Brad Sondahl on tue 19 oct 99

I have a glaze which seems to get thinner by the time the bucket is
getting empty.
This doesn't make particular sense to me--due to frequent settling one
might expect the glaze to be thicker as the bucket gets empty.
It seems like the mechanism of making glaze stick to a pot is this: the
dry or bisque pot sucks in moisture from the glaze, leaving a thickened
coating on the pot. I can't see why extra glaze should stick, leaving
the water behind. Of course I could be misled that this is happening,
as it's rather a subjective appraisal...
Any good theories or interesting guesses?

--
Brad Sondahl
http://www.camasnet.com/~asondahl/bradindex.html
Sondahl homepage http://www.camasnet.com/~asondahl
Original literature, music, pottery, and art

Rod, Marian, and Holly Morris on wed 20 oct 99

Is there a binder such as CMC in the glaze. I've had glazes poop out on me
that were mixed with CMC. For some reason, the stuff just got runny after a
while.
----- Original Message -----
From: Brad Sondahl
To:
Sent: Tuesday, October 19, 1999 5:03 PM
Subject: Glaze viscosity, top to bottom of bucket


> ----------------------------Original message----------------------------
> I have a glaze which seems to get thinner by the time the bucket is
> getting empty.
> This doesn't make particular sense to me--due to frequent settling one
> might expect the glaze to be thicker as the bucket gets empty.
> It seems like the mechanism of making glaze stick to a pot is this: the
> dry or bisque pot sucks in moisture from the glaze, leaving a thickened
> coating on the pot. I can't see why extra glaze should stick, leaving
> the water behind. Of course I could be misled that this is happening,
> as it's rather a subjective appraisal...
> Any good theories or interesting guesses?
>
> --
> Brad Sondahl
> http://www.camasnet.com/~asondahl/bradindex.html
> Sondahl homepage http://www.camasnet.com/~asondahl
> Original literature, music, pottery, and art
>