Sam or Mary Yancy on wed 18 jan 06
Arrnold and clay are community - . I remember a "Temperature Color Chart" ( that ran from "dull red to bright white) with a termperature scale) plus a lot of other info and I was given and posted many years ago when I was working as a Heat Treater of steel/metals. The Metalurgist I was working for (brilliant!!!) posted it in our work area for us to use "Just in case" our measuring devices failed as a way (and a requirement) to "check the temperature of the furnace" just in case our temperature guages were innacurate. . We always used it In addition to the temperature guages and so on to avoid ruining a very expensive load of steel/metals we were heat treating. We really had to hold "Temperature AND TIME" to a very close requirement as we were heat treating exotic metals to a very close margin. One of our expervices was to heat treat stainless steel with high nickel content to a diamond hard surface and deap as 1/16 inch and still allow it to be somewhat flexible and
non-corrosive. P.S. after all these years, I can still pretty well estimate temperature by "color" of the kiln/pottery or heated metal, etc.
QUESTTION FOR THE CLAY ART COMMUNITY - I wonder if there are any "temperature color charts available for us clayarters to obtain??? Would be a good addition to post near your kiln....Sam in Daly City
Arnold Howard wrote:
"so I learned to estimate exposure by eye.
It's the same with a kiln. I think it's useful to observe the color of light
coming out of the kiln during each stage of firing. If you have a digital
kiln, notice the temperature for dark red, cherry red, yellow, bright
yellow, etc. Mentally note the color of the firing chamber when the Kiln
Sitter trips.
Then if for some reason you ever have to turn off your kiln manually without
the aid of cones, Kiln Sitter, pyrometer, or controller, you could do it by
eye alone just like I estimated exposure with my Leika.
By the way, this would make an interesting science project for your
school-age kids.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Snail Scott on thu 19 jan 06
At 07:30 AM 1/18/2006 -0800, you wrote:
> QUESTTION FOR THE CLAY ART COMMUNITY - I wonder if there are any
"temperature color charts available for us clayarters to obtain?
Glenn Nelson's good old book, 'Ceramics', has a
(black-and-white) color chart in back. Copies of
this book can be picked up on eBay and the like
for about $5. I keep my copy around just for this
page, to show students. It's like having a color
chart with a whole book thrown in for free! ;)
-Snail
skiasonaranthropos@FSMAIL.NET on thu 19 jan 06
Hello,
I can not atest for its accuracy but a Google Image search
for =93temperature color chart=94 found:
http://www.r2d2u.com/htm%20pages/color%20firing%20chart.htm
Regards,
Antony
Mary White on thu 19 jan 06
I lthink the one in the back of Robbin Hopper's=20
Ceramic Spectrum is better, but best would be one=20
with actual colour swatches.
Mary White
on the Sunshine Coast, BC, Canada
>Hello,
>I can not atest for its accuracy but a Google Image search
>for =93temperature color chart=94 found:
>http://www.r2d2u.com/htm%20pages/color%20firing%20chart.htm
>
>Regards,
>Antony
>
>___________________________________________________________________________=
___
>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=20
>reached at melpots@pclink.com.
--
Mary White
HARBOUR PUBLISHING
Box 219
Madeira Park, BC
V0N 2H0
------------------
=46or current news and complete book & author=20
information, visit our website,=20
http://www.harbourpublishing.com.
skiasonaranthropos@FSMAIL.NET on thu 19 jan 06
Hello Mary,
I agree that reference to colours is preferable but this is at least
immediately available. And incidentally comparison of colour is the basis
for the long used optical pyrometers which have now largely been replaced
by new technologies of non contact temperature measurement: have a look at
www.temperatures.com/opyro.html and for a picture about half way
downwww.rhunt.f9.co.uk/Museum/Instruments/Museum_Instruments_Page1.htm
Regards,
Antony
Ivor and Olive Lewis on fri 20 jan 06
Dear Friends
Although the notion of a colour chart for estimating temperature may =
seem like a good idea it has some drawbacks. It would be unwise to =
permanently rely on such a device to assess the temperature of the =
interior of a kiln.
Beside visible rays, a kiln begins to give out some powerful Infra Red =
radiation once it approaches red heat. By the time you start to see =
yellow it will be emitting Ultra Violet radiation. Both can damage the =
interior of an eye. Prolonged sightings, for even a few seconds, can =
cook internal structures where the rays focus. Think of your eye as a =
"Burning Glass".
Take care of your eyesight. So much incidental damage is irreparable. As =
you age you may become a victim of Macular Degeneration, when the most =
sensitive part of your retina ceases to function.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Bill Jones on fri 20 jan 06
If you are looking for a color chart for kiln firing, check out our
"Kiln Firing Chart." We first published this in 1999 and it has been
frequently requested, so we made it available on our website for free
download. http://www.potterymaking.org/KilnFiringLayout.pdf
=20
Bill Jones
Editor, Pottery Making Illustrated
The American Ceramic Society
735 Ceramic Place, Suite 100
Westerville, OH 43081
614-895-4219
614-891-8960 (fax)
http://www.potterymaking.org/
=20
Your Resource for Ceramic Techniques
=20
skiasonaranthropos@FSMAIL.NET on fri 20 jan 06
Hello Bill,
Given your generoisty it seems rather churlish to point out an error on
the chart ... mullite is described as a type of silica which obviously its
not
Sorry, sorry, sorry about being picky but thought it better to comment so
further editions can be corrected
Regards,
Antony
| |
|
