Catherine White on tue 8 oct 02
I searched Amazon.com, Barnes & Noble, and Half.com........ couldn't locate
The Glaze Book, A Visual Catalogue of Decorative Ceramic glazes. There was
a long list of books from Thames and Hudson, but not that one. It sounds
like a more sophisticated version of The Potter's Palette. If you have more
info, I'd appreciate it.
Thanks,
Catherine in Yuma, AZ
Two ancient electric kilns. Both outside.
It never rains here at the Mexican border.
One partner, one kid, three cats. All inside.
----- Original Message -----
From: "Patrice Murtha"
Subject: Quartz
> I just purchased a new book entitled The Glaze book, A visual
> Catalogue of Decorative ceramic glazes. It was published in England
> by Thames and Hudson.
Patrice Murtha on tue 8 oct 02
I just purchased a new book entitled The Glaze book, A visual
Catalogue of Decorative ceramic glazes. It was published in England
by Thames and Hudson. Most of the materials I can get but there are
a few I'm not sure about. A number of the receipes call for quartz.
Is this the same as silica? What can I subsitute for this? Can I get
quartz? Thanks for helping me with this.
If you haven't seen this book I highly recommend it. It's published
by Thames and Hudson and has around 300 pages of glazes with sample
tiles beside each glaze. The book is divided into
categories--earthenware, stoneware, porcelain and soda.
--
Patrice Murtha
Ryerson and Burnham Libraries
The Art Institute of Chicago
111 S. Michigan Ave.
Chicago, IL 60603
312-443-3671
Snail Scott on tue 8 oct 02
At 09:24 AM 10/8/02 -0500, you wrote:
>... A number of the receipes call for quartz.
>Is this the same as silica?
Many people use the terms quartz, silica, and
flint interchangeably.
-Snail
Reno, NV
Lily Krakowski on tue 8 oct 02
You dance with the one that brung ya, Gull.
Silica has many sources. Quartz is a silica source. In England that
apparently is their general source.Cardew describes it as a crystalline or
'more properly macrocrystaline" silica.
Flint which recipes also often use as silica source is microcrystaline or
chalcedonic silica.
There is a difference in the firing cycle and I will let the more learned
explain. As far as I am concerned the general run of the mill glazes don't
give a hoot.
In other words, when it says flint or quartz your silica will serve.
Patrice Murtha writes:
> I just purchased a new book entitled The Glaze book, A visual
> Catalogue of Decorative ceramic glazes. It was published in England
> by Thames and Hudson. Most of the materials I can get but there are
> a few I'm not sure about. A number of the receipes call for quartz.
> Is this the same as silica? What can I subsitute for this? Can I get
> quartz? Thanks for helping me with this.
>
> If you haven't seen this book I highly recommend it. It's published
> by Thames and Hudson and has around 300 pages of glazes with sample
> tiles beside each glaze. The book is divided into
> categories--earthenware, stoneware, porcelain and soda.
> --
> Patrice Murtha
> Ryerson and Burnham Libraries
> The Art Institute of Chicago
> 111 S. Michigan Ave.
> Chicago, IL 60603
> 312-443-3671
>
> __________________________________________________________________________
> ____
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389
Be of good courage....
Martin Howard on wed 9 oct 02
In the recent publication of Nexus I read that many of this seasons crop of
crop circles had within them a very fine silica dust, quartz.
So that is proof that the aliens (or human hoaxers) who create these
beautiful objects are potters.
So how can we get them to contribute to ClayArt and share any other
wonderful raw or alien materials they may have?
Martin Howard
Webbs Cottage Pottery
Woolpits Road, Great Saling
BRAINTREE, Essex CM7 5DZ
01371 850 423
martin@webbscottage.co.uk
http://www.webbscottage.co.uk
Updated 6th July 2002
Dave Finkelnburg on wed 9 oct 02
Hello Patrice,
Quartz is a source of silica. With relatively pure quartz, about 100%
SiO2 (silica), the terms quartz and silica are interchangeable.
I believe the authors of the book you cite use the term quartz to
distinguish their silica source from flint, another, but very different
silica source. To be precise, flint is not the same material as quartz.
Flint is typically lower in silica than quartz. Quartz is usually at least
99.7% SiO2. Flint can be more like 93% silica (the rest is calcium
carbonate).
In recipes which call for a large amount of flint, one may want to
recalculate to silica/quartz which can be considered 100% SiO2.
Unfortunately, in North America there are a lot of recipes floating
around using the term flint when what's used is ground quartz sand,. One
needs to know the original source of such recipes to know which material was
actually used.
Good glazing!
Dave Finkelnburg in Idaho, recovering from a mild bout of ClayArt
withdrawal yesterday. Jeez, I actually had time to get work done!
Leland G. Hall on wed 9 oct 02
And what about amorphous silica. I have both. Whats the
diff?
Leland in La Pine, OR, where the wolves were howling at
4:am.
On Tue, 8 Oct 2002 21:22:56 -0700, Snail Scott
wrote:
>At 09:24 AM 10/8/02 -0500, you wrote:
>>... A number of the receipes call for quartz.
>>Is this the same as silica?
>
>
>Many people use the terms quartz, silica, and
>flint interchangeably.
>
> -Snail
> Reno, NV
>
>___________________________________________________________________________
___
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Ron Roy on sun 13 oct 02
Dave Finkelnburg is right - quartz and silica - the way we use the words -
are the same - ground up SiO2 with little contaminents - some small amount
of Al2O3.
Flint is ground up flint stones - mosly a Great Britain thing - and it is
contaminated with CaO so it will melt a little easier than silica.
Amorphus silica is non crystaline silica and will melt a bit easier than
the crystaline type.
Most North American recipes - even though they say Flint - mean silica.
RR
>>... A number of the receipes call for quartz.
>>Is this the same as silica?
>
>
>Many people use the terms quartz, silica, and
>flint interchangeably.
>
> -Snail
> Reno, NV
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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