Jo Gilder on fri 23 oct 98
Hello Everyone,
I recently purchased a large amount of pottery stuff from someone who
had decided to get out of the business. Among the kilns, wheels, etc.
there was a lot of bags of glaze ingredients. Now, I do not mix glazes
(I am still working on form and the basics) and I am in a quandry as to
what to do with these bags. I don't have a lot of storage space
and I am wondering if it is worth keeping them around in case I decide
at some future date to learn to mix glazes or if I should just sell them
now and buy more when I get to that place in my pottery. I don't even
know if I have the right things to even mix a glaze. I will be soon
experimenting with pit firing, can I just throw these things in
the pit alonf with everything else or do they have to be mixed to work?
The ingredients I have are as follows; any suggestions would be well
received. Thanks.
Jo (a REAL novice in glaze chemistry)
magilder@worldnet.att.net
Ingredients:
Amorphous Silica 1# Barium carbonate 5# Bent B 1#
Bone Ash 2# Boric Acid 2# Borax Finghydo? 1#
Cornwall stone 10# Cryolite 2# Custer 3#
EPK 5# Flint 395 1# Gerstley Borate 7#
Illmenite Powder 1# Lithium Carbonate 2# Magnesium Carbonate 1#
Nepheline Syenite 5# Rutile Grandular 1# Silica Sand 5#
Superpax 3# Talc Steatite 5# Whiting 5#
Wollastonite 2# Frit # 3134 5#
--
Jo Gilder
Panama City, FL
--
Jo Gilder
Panama City, FL
Karen Gringhuis on mon 26 oct 98
Jo - How serious are you about ever getting to the point of learning
glazes in your pottery? You obviously are serious about somethingsince you bought all that stuff? If you think you eventually
want to learn glazes, you have a good start on some basic
ingredients in quantities lg. enough to enable you to mix tests.
To restock these things would be a bit of a hassle & you would pay
shipping charges from a ceramic supplier to get them. If you
can fit these bags in to a few lg. buckets you may want to keep
them. I doubt you would realize much $$ by selling them.
As for pit firing, I don't do it, but I don't see anything
in your raw mats which leaps out at me as a plus if thrown into
the pit. I once participated in a high firing in which we stuffed the
kiln w/ dry dog food what has lots of strange oxides in it which
colored the pots - some. This might work at lot fire temps.
Good luck. Karen Gringhuis
Linda Blossom on tue 27 oct 98
Just a note - you mentioned the oxides in dog food. There is cobalt =
carbonate
in a brand that I was buying -- then I saw titanium dioxide on some =
doughnuts
with a powdered sugar coating. Keep reading those labels.
Linda Blossom
2366 Slaterville Rd.
Ithaca, NY 14850
6075397912
www.artscape.com
blossom=40lightlink.com
-----Original Message-----
From: Karen Gringhuis =3Ckgpottery=40bigvax.alfred.edu=3E
To: CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Date: Monday, October 26, 1998 9:10 AM
Subject: Re: Glaze chemicals
----------------------------Original message----------------------------
Jo - How serious are you about ever getting to the point of learning
glazes in your pottery? You obviously are serious about something=5C
since you bought all that stuff? If you think you eventually
want to learn glazes, you have a good start on some basic
ingredients in quantities lg. enough to enable you to mix tests.
To restock these things would be a bit of a hassle =26 you would pay
shipping charges from a ceramic supplier to get them. If you
can fit these bags in to a few lg. buckets you may want to keep
them. I doubt you would realize much =24=24 by selling them.
As for pit firing, I don't do it, but I don't see anything
in your raw mats which leaps out at me as a plus if thrown into
the pit. I once participated in a high firing in which we stuffed the
kiln w/ dry dog food what has lots of strange oxides in it which
colored the pots - some. This might work at lot fire temps.
Good luck. Karen Gringhuis
Earl Brunner on thu 28 dec 00
Mg0 is magnesium oxide and Al is alumina and O is Oxygen (Al203 then
being Alumina oxide)
The Chemistry aspect of glazes can be daunting if you don't have the
background (been there, done that). I went through it back before
electronic calculators, let alone before glaze calculation software.
If you are seriously interested in the subject, then you will need to
get a book or two. Ian Currie in Australia has a couple of books that
are supposed to be great for beginners and those that don't want to go
the math route to glaze chemistry. I just got them in the mail
yesterday, but they are highly recommended on clayart.
Hamer's The Potter's Dictionary of Materials and Techniques (often just
called Hamer's) is a great reference book, many swear by it, but it is a
dictionary or encyclopedia and I don't think it approaches topics the
same as in a couple of other books.
Clay and Glazes for the Potter by Daniel Rhodes (recently revised by
Robin Hopper) should be a great book.
> I am pretty new to the clay and glaze
> field and I am thankful that you all are here. I have
> learned so much by reading Clayart. I am fascinated
> by all the possibilities! Now, pardon me for my
> inexperience, but upon reading your recipes for
> Williams 1.2.3.4. Matte versions #2 and #3, what does
> +MgO and Al2O3 mean? Do you add some amount of it to
> the following recipe? This is probably obvious to
> everyone else so forgive me.
> Thank you in advance.
> Sincerely, Gretchen Woodman
--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
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