iandol on wed 9 oct 02
Dear Chris Rupp,
I am sure many people will appreciate that information. The pale pink =
hue of the raw glaze seems to suggest a low concentration of Red Iron =
Oxide.
Thanks for your information.
Best regards,
Ivor Lewis
iandol on thu 10 oct 02
Dear Ron Roy,
I notice that little has been said about firing conditions other than to =
take the glaze up to Cone 10.
If it is Iron Oxide and this seems to be confirmed by more recent posts =
and the purity is important, do you know of any good sources of =
five-nines pure Fe2O3. I ask this because I suspect that any =
contamination from Manganese dioxide would induce an Umber tinge to the =
pure hue.
Best regards,
Ivor Lewis. Redhill, South Australia.
Fredrick Paget on fri 11 oct 02
Alpha Aesar ( http://www.alfa.com ) has 99.998percent iron oxide (Fe2O3)
at U.S. $592.00 for 500 grams, 25 grams for only $26.60.
Fred
>>If it is Iron Oxide and this seems to be confirmed by more recent posts and
>>the purity is important, do you know of any good sources of five-nines pure
>>Fe2O3. I ask this because I suspect that any contamination from Manganese
>>dioxide would induce an Umber tinge to the pure hue.
>>Ivor Lewis
From Fred Paget, Marin County, California, USA
Chris Rupp on fri 11 oct 02
If you are thinking about experimenting with this particular yellow, you
should also know that it is fired to cone 12, not 10. Which means you have
to use a clay body which will withstand Cone 12 temps also.
Good Luck,
Chris
>
>Dear Ron Roy,
>
>I notice that little has been said about firing conditions other than to
>take the glaze up to Cone 10.
>
>If it is Iron Oxide and this seems to be confirmed by more recent posts and
>the purity is important, do you know of any good sources of five-nines pure
>Fe2O3. I ask this because I suspect that any contamination from Manganese
>dioxide would induce an Umber tinge to the pure hue.
>
>Best regards,
>
>Ivor Lewis. Redhill, South Australia.
>
>______________________________________________________________________________
>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.
_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx
iandol on sun 13 oct 02
Dear Fredrick Paget,
Well that settles the problem of availability of High Purity Iron Oxide. =
The price seems to bear some relationship to the perceived value of the =
original preparation.
Those who wish to explore the preparation of a cone 12 Matt Yellow Glaze =
now have a starting point.
Now, I have just finished preparing 108 new formulations to be tested on =
several clays. Made the first three tiles, several more to lay out, =
then, a look at some colour blends. So it may be a while before I get =
around to this particular project.
Thanks for your input and information.
Best regards,
Ivor Lewis, Redhill, South Australia.=20
Cantello Studios on tue 15 oct 02
All this yellow talk, its just a High Mgo Matt with good old red iron at
1% to 3%. Hard to give away the one Otto uses has zirconium in it. Lets talk
about testing some rare earth oxides love the colors. I plan on doing
some testing any interest out there? Otto gets the big bucks because he's
Otto and being 86 years of age helps. Some day? (To be so lucky)
Chris
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Fredrick Paget
Sent: Friday, October 11, 2002 6:12 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: : Otto Heino Yellow
Alpha Aesar ( http://www.alfa.com ) has 99.998percent iron oxide (Fe2O3)
at U.S. $592.00 for 500 grams, 25 grams for only $26.60.
Fred
>>If it is Iron Oxide and this seems to be confirmed by more recent posts
and
>>the purity is important, do you know of any good sources of five-nines
pure
>>Fe2O3. I ask this because I suspect that any contamination from Manganese
>>dioxide would induce an Umber tinge to the pure hue.
>>Ivor Lewis
From Fred Paget, Marin County, California, USA
____________________________________________________________________________
__
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.
| |
|
