foxpots on tue 21 dec 04
Dear Fellow Clay Arters,
I have been given a commission to do some incense burners. They are to be
in the form of a sugar bowl with lid; and to have decorative designs cut
out of the sides (for the incense to flow through).
My problem is that, given the fact that my product is high fired stoneware
and does not expand and contract readily, how do I keep the clay from
cracking? I should not like to make the burners out of any other clay than
the one I always use. I have had the following thoughts: 1. To provide
about a tablespoon of sand with each incense burner with instructions to
place the incense on a thick layer of sand. Question for this is: Will
this thick layer of sand in fact provide enough protection from thermal
shock? 2. To provide a commercially made small container for the incense,
to protect the pot from thermal shock. Question for this is: Do any of you
know of such a small container on the market?
I apologize for using so many words to describe my problem, and thank you in
advance for your thoughts.
Jean Wadsworth Cochran
http://www.foxhollowpottery.com
www.kycraft.ky.gov/craftcgi-bin/index.cgi?busid=186
pdp1@EARTHLINK.NET on tue 21 dec 04
Hi Jean,
I think the thing-to-do would be to make a couple, out of
your familiar accustomed Clay, and test them.
Even overload them in their tests...
Are these to accomidate the kind of Incense burning as uses
the little Saltpeter Charcaol pucks? If so, fill one with
them, add some Incense so it smells better, and see what it
does.
My guess...is that you will be fine.
But if not, at least you will know for sure, and can start
making some test-items from a differing Clay or cone or grog
percentage or as may be.
Have fun...
Phil
el ve
----- Original Message -----
From: "foxpots"
> Dear Fellow Clay Arters,
>
> I have been given a commission to do some incense burners.
They are to be
> in the form of a sugar bowl with lid; and to have
decorative designs cut
> out of the sides (for the incense to flow through).
>
> My problem is that, given the fact that my product is high
fired stoneware
> and does not expand and contract readily, how do I keep
the clay from
> cracking? I should not like to make the burners out of
any other clay than
> the one I always use. I have had the following thoughts:
1. To provide
> about a tablespoon of sand with each incense burner with
instructions to
> place the incense on a thick layer of sand. Question for
this is: Will
> this thick layer of sand in fact provide enough protection
from thermal
> shock? 2. To provide a commercially made small container
for the incense,
> to protect the pot from thermal shock. Question for this
is: Do any of you
> know of such a small container on the market?
>
> I apologize for using so many words to describe my
problem, and thank you in
> advance for your thoughts.
>
> Jean Wadsworth Cochran
Bruce Girrell on tue 21 dec 04
Answer #1: Yes, I would expect a layer of sand to protect the burner
adequately.
However, I would not count on someone actually putting the sand in place,
nor would I count on the original sand layer staying in place.
I would recommend a ripple pattern of some sort or a set of raised points on
the base of the burner to minimize the contact area between the hot incense
and the pot.
Another option would be a metal disk or similar object that would quickly
distribute the heat to a much larger area.
Bruce "no, officer, that's just my incense" Girrell
L. P. Skeen on tue 21 dec 04
Incense doesn't get THAT hot and so should not present a cracking problem,
but IMO your best bet is the sand. It'll take more than a tablespoon tho.
Maybe 1/4 cup.
L
----- Original Message -----
> My problem is that, given the fact that my product is high fired stoneware
> and does not expand and contract readily, how do I keep the clay from
> cracking?
pdp1@EARTHLINK.NET on tue 21 dec 04
Hi Lisa,
Yahhhh...you are thinking of the Incense 'cones' or stubby
cylinders which tend to put themselves out anyway before
reaching their verymost bottom. But the old fashioned kind
of Incense used Charcoal to burn it rather than being
self-burning...
Charcoal on which one put or sprinkled the actual (not
especially flammible itself, and not self sustaining to any
great extent for burning) Incense.
Now-a-days, the Charcoal usually is resorted to in the form
of round little Store-bought pucks, that have been saturated
in Sodium Nitrate or the likes so they will begin to
smoulder or burn as an ember may, for being touched
initially with a burning Match. These get quite hot, even as
plain Charcoal will...or as a Charcoal 'Briquette' (
originally, a Ford Motor Company product you know, ) will.
So...depending on the kind of Incense-use the end-user may
elect...
I think a Maker of Lidded Incense Burning forms will best
anticipate the options their Work may enjoy or suffer at the
hands of others...and if those others are Romantics, or
old-fashioned foreigners of some kind ( if any still exist)
or some sort of Religious devotees or other who observe
fine-points of old time ritual...then...they will get plenty
hot, you may be sure...
In fact, the addition of a Chain as becomes three chains
about the burner itself, and a secure lid...would make a
Censer for that matter...
Happy Hollidays...
And Work Days...
Phil
el ve
----- Original Message -----
From: "L. P. Skeen"
> Incense doesn't get THAT hot and so should not present a
cracking problem,
> but IMO your best bet is the sand. It'll take more than a
tablespoon tho.
> Maybe 1/4 cup.
>
> L
> ----- Original Message -----
> > My problem is that, given the fact that my product is
high fired stoneware
> > and does not expand and contract readily, how do I keep
the clay from
> > cracking?
Janet Kaiser on thu 23 dec 04
Gosh, Mike, do you class this as thermal shock? I wonder if it
really is? It certainly would not occur to me as such... Indeed,
we have wooden incense burners because even the cone type do not
get hot enough to set fire to the wood enclosing it... To wit our
forester and shepherd "Rauchem=E4nnchen" are out at this time of
year proving that very point.
The essential oil burner also in heavy use at this time of year
would be more likely to be exposed to thermal shock IMO. For
example if it is really hot after an 8-hour night-light has
burned the oil-and-water container dry, but we have not noticed
for an hour or so and then simply refill it with ice cold water.
Now given that scenario, I definitely would think of as thermal
shock...
Sincerely
Janet Kaiser
Ancient Egyptian saying: "Wealth takes charge of its owner"
*** IN REPLY TO THE FOLLOWING MAIL:
>You'll have to excuse the late response to this thread but it
just
>dawned on me that I use my incense burner with stick and cone
incense
>all the time. It is a face with a large nose and tongue sticking
out,
>which catches the ash from the stick kind and a surface for the
cone
>kind. No Problem at all with thermal shock from the cones. They
leave
>black circles is all which gives the guy a real strange look
with black
>dots on his tongue. It was fired at cone o4. Mike Gordon
*** THE MAIL FROM Mike Gordon ENDS HERE ***
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