Saralyn Lindsey on wed 17 feb 99
Hi all,
In an effort to learn how glazes work, I am realizing that I need a
reference for what is in these ingredients that are added to glazes.
For example, nepheline syenite. What makes up the "ingredient"
nepheline syenite? Since everyone calculates their glazes by the
individual parts for a given "ingredient", I am hoping that someone
has made up a reference guide for those commonly used so that I can
sit down and calculate what is in any individual glaze, to then
determine if the glaze will "fit". I realize that batch to batch will
vary, but there must be, I hope, some standard that people use for
these calculations. Thank you, Sandy Lindsey in Mystic, CT
_________________________________________________________
DO YOU YAHOO!?
Get your free @yahoo.com address at http://mail.yahoo.com
Dorothy Weber on thu 18 feb 99
I use the GlazChem software, it has all of the elements listed in a database.
I highly recommend it. You can download it from rjw@studiopotter.org I
think he asks for a modest user fee and he does offer support.
gambaru on fri 19 feb 99
Suggestions: Potter's Dictionary by Frank and Janet Hamer and Tony Hansen's
(digitalfire.com) Magic of Fire Reference Book. MB
-----Original Message-----
From: Saralyn Lindsey
To: CLAYART@LSV.UKY.EDU
Date: Wednesday, February 17, 1999 9:01 AM
Subject: glaze calc
----------------------------Original message----------------------------
Hi all,
In an effort to learn how glazes work, I am realizing that I need a
reference for what is in these ingredients that are added to glazes.
For example, nepheline syenite. What makes up the "ingredient"
nepheline syenite? Since everyone calculates their glazes by the
individual parts for a given "ingredient", I am hoping that someone
has made up a reference guide for those commonly used so that I can
sit down and calculate what is in any individual glaze, to then
determine if the glaze will "fit". I realize that batch to batch will
vary, but there must be, I hope, some standard that people use for
these calculations. Thank you, Sandy Lindsey in Mystic, CT
_________________________________________________________
DO YOU YAHOO!?
Get your free @yahoo.com address at http://mail.yahoo.com
Alex Wilson on fri 19 feb 99
Hello Sandy, Your materials supplier can probably give you a specific
molecular analysis for any material from them - they get the analyses from the
labs of _their_ suppliers.
The 'formula' for Nepheline is,
K2O.3Na2O.4Al2O3.9SiO2
If your supplier won't or can't give you the info, then check your materials
bags and call the manufacturer directly - most, but not all, are e-mail savvy.
I can send you a list of manufacturers, should you need it.
Good luck,
Alex
Marcia Selsor on sun 21 feb 99
There are some classic textbooks out there such as Clay and Glazes for
the Potter by Daniel Rhodes. I like Greg Daly's book on Glazes for
guiding experimentation for students. There are more techy books as well
Parmlee's Book was good. Occasionally Studio Potter Magazine focuses on
a type of glaze like the issue decades ago on Reds.
gambaru wrote:
>
> ----------------------------Original message----------------------------
> Suggestions: Potter's Dictionary by Frank and Janet Hamer and Tony Hansen's
> (digitalfire.com) Magic of Fire Reference Book. MB
> -----Original Message-----
> From: Saralyn Lindsey
> To: CLAYART@LSV.UKY.EDU
> Date: Wednesday, February 17, 1999 9:01 AM
> Subject: glaze calc
>
> ----------------------------Original message----------------------------
>
> Hi all,
>
> In an effort to learn how glazes work, I am realizing that I need a
> reference for what is in these ingredients that are added to glazes.
> For example, nepheline syenite. What makes up the "ingredient"
> nepheline syenite? Since everyone calculates their glazes by the
> individual parts for a given "ingredient", I am hoping that someone
> has made up a reference guide for those commonly used so that I can
> sit down and calculate what is in any individual glaze, to then
> determine if the glaze will "fit". I realize that batch to batch will
> vary, but there must be, I hope, some standard that people use for
> these calculations. Thank you, Sandy Lindsey in Mystic, CT
>
> _________________________________________________________
> DO YOU YAHOO!?
> Get your free @yahoo.com address at http://mail.yahoo.com
--
Marcia Selsor
selsor@imt.net
http://www.imt.net/~mjbmls
http://www.imt.net/~mjbmls/spain99.html
LindaC on mon 6 mar 06
DAVE your observation about the usefulness of understanding glaze
calculation is right on. The average potter just wants a beautiful result
whatever it takes to get it--a means to an end. I so much appreciate those
who teach others how to-get there- how to understand all the ins and outs,
all the tricks of the trade. Thanks to you Dave and all the Clayarters who
I am learning so much from. Linda in cold gray Ohio
LindaC on mon 6 mar 06
Thankyou Lili, you give me courage. Linda-Ohio
Donna Nicholas on tue 9 aug 11
The mathematics of molecular calculations, whether you do it on paper
or with your computer, makes real sense only if it's supported by
your understanding of the properties of all the materials in the
glaze room. Much of the time, a simple line blend test will alter a
glaze to your satisfaction. It really isn't rocket science, though
some students think it is because they haven't encountered molecular
formulas before. I had a lot of fun teaching the glace calc course,
because it provided my math-phobic students a way get past their hang
ups and do the math with a pencil, paper, and calculator. But, at
the same time, they had to 'demonstrate' results by mixing up the
glazes and firing them.
Nothing can replace common sense and an intimate knowledge of the
properties of the materials in those bins and canisters! Takes
time, and lotsa' glaze tests.
Donna Nicholas
| |
|
