Mike Gordon on tue 24 jan 06
Kristina,
I have fired Laguna C10 B-Mix as well as Soldate 60 at C6 without any
problems, I bang them around quite a bit as I use them & they seem
strong. Mike Gordon
On Jan 24, 2006, at 8:21 AM, Kristina wrote:
> Newbie question.
>
> I've always fired my wares at the studio where I was taking classes
> (^10
> gas kiln) and I used Laguna B-mix (^10). I've now bought myself a used
> electric kiln (^10), but I still have 100 lbs of ^10 B-mix laying
> around.
>
> If I only fire the ^10 B-mix up to ^5 (to occasionally save energy)
> should
> I expect any adverse effects (easier breakability, etc)? Or should I
> save
> my ^10 clay for the ^10 firings and buy myself some ^5 clay?
>
> Thanks,
> Kristina
>
> _______________________________________________________________________
> _______
> 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.
>
Kristina on tue 24 jan 06
Newbie question.
I've always fired my wares at the studio where I was taking classes (^10
gas kiln) and I used Laguna B-mix (^10). I've now bought myself a used
electric kiln (^10), but I still have 100 lbs of ^10 B-mix laying around.
If I only fire the ^10 B-mix up to ^5 (to occasionally save energy) should
I expect any adverse effects (easier breakability, etc)? Or should I save
my ^10 clay for the ^10 firings and buy myself some ^5 clay?
Thanks,
Kristina
Jennifer Schroeder on tue 24 jan 06
Hi...
I am also a "newbie" (just a year out of college), but here is what I think=
.
You can fire it to 5 if you want and like you said you will risk your piece=
s
being a little more fragile. The other thing is that if you are using c10
glazes, they won't mature at c5. If you use c5 glazes (what I would do), yo=
u
may have some claybody/glaze fitting problems. But if you test it out and i=
t
seems to work, I would just do it. I had a way of procrastinating on
projects in college and took shortcuts like that all the time. For the most
part things worked out just fine. You may want to weigh the more experience=
d
potter's opinions greater than mine, but that is what I would do.
Jennifer
ps. make sure that your glazes from the gas kiln are suitable for oxidation
firings in your new electric kiln.
On 1/24/06, Kristina wrote:
>
> Newbie question.
>
> I've always fired my wares at the studio where I was taking classes (^10
> gas kiln) and I used Laguna B-mix (^10). I've now bought myself a used
> electric kiln (^10), but I still have 100 lbs of ^10 B-mix laying around.
>
> If I only fire the ^10 B-mix up to ^5 (to occasionally save energy) shoul=
d
> I expect any adverse effects (easier breakability, etc)? Or should I sav=
e
> my ^10 clay for the ^10 firings and buy myself some ^5 clay?
>
> Thanks,
> Kristina
>
>
> _________________________________________________________________________=
_____
> 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.
>
Craig Clark on tue 24 jan 06
Kristina, after you have used up the cone 10 clay body you have go ahead
and get a cone 6 body. If you are going to fire to cone 6 then, assuming
we are talking functional here, make sure you have a body which is fully
vitrified at that temp and glazes which are mature and fit the body.
Hope this helps
Craig Dunn CLark
619 East 11 1/2 St
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
Jennifer Schroeder wrote:
>Hi...
>I am also a "newbie" (just a year out of college), but here is what I think.
>You can fire it to 5 if you want and like you said you will risk your pieces
>being a little more fragile. The other thing is that if you are using c10
>glazes, they won't mature at c5. If you use c5 glazes (what I would do), you
>may have some claybody/glaze fitting problems. But if you test it out and it
>seems to work, I would just do it. I had a way of procrastinating on
>projects in college and took shortcuts like that all the time. For the most
>part things worked out just fine. You may want to weigh the more experienced
>potter's opinions greater than mine, but that is what I would do.
>Jennifer
>ps. make sure that your glazes from the gas kiln are suitable for oxidation
>firings in your new electric kiln.
>
>
>On 1/24/06, Kristina wrote:
>
>
>>Newbie question.
>>
>>I've always fired my wares at the studio where I was taking classes (^10
>>gas kiln) and I used Laguna B-mix (^10). I've now bought myself a used
>>electric kiln (^10), but I still have 100 lbs of ^10 B-mix laying around.
>>
>>If I only fire the ^10 B-mix up to ^5 (to occasionally save energy) should
>>I expect any adverse effects (easier breakability, etc)? Or should I save
>>my ^10 clay for the ^10 firings and buy myself some ^5 clay?
>>
>>Thanks,
>>Kristina
>>
>>
>>______________________________________________________________________________
>>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.
>>
>>
>>
>
>______________________________________________________________________________
>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.
>
>
>
Jon Pacini on wed 25 jan 06
Greetings All, Hi Kristina--
This is always a fun topic ---usually with lots of opinions.
The short answer is--- Yes, you can fire a ^10 clay clay at ^6 or any
temperature you want to. And B-mix is a pretty good clay to fire at various
temperatures. That is, it's susceptible to some degree to all of the
problems I'm going to mention next, but not usually to the point of causing
catastrophe.
The long answer is-----When you drop down in temperature with a body that is
designed to be fired at ^10 the porosity of the ware goes up, the strength
goes down and the COE of the body changes.
So what does that mean?
As the porosity goes up, and if the glazes you are putting on the ware
craze, the ware becomes susceptible to seeping. So it is important that the
glaze not craze if you are making vases. If the ware you are making is not
intended to hold water or the glazes don't craze, you should be fine.
As the ware gets weaker it is susceptible to chipping or cracking. At ^6, a
^10 body is not as weak as earthen ware and as Mike said, you can still bang
them around pretty good without much noticeable difference in failure.
And finally-- the COE changes---this relates to glaze/body fit. Different
bodies react differently to changes in firing temperatures. Some will fit
other temperature glazes quite well and others will craze or even shiver.
And to be honest, a lot of it has to do more with the glaze you choose to
use than the body. Without testing the clays and glazes together there is no
way to guarantee how they will fit together anymore than guaranteeing how
any particular clay and glaze will fit together.
Your call as to what you may want to do---
Best regards
Jon Pacini
Clay Manager
Laguna Clay Co
Ron Roy on thu 26 jan 06
Hi Kristina,
Get the cone 6 version - mainly because the cone 10 version will not be
vitrified enough to exclude water. This probably means the absorbed water
will rehydrate the clay and the glaze will (if not crazed) craze later.
That means it will leak sooner or later.
Because there is water in the clay it will heat up in a microwave oven and
could burn the cook.
Accumulated water in porous pottery can eventually become contaminated with
food - there have been reports here on ClayArt of such accumulated liquids
coming out of such ware during use.
Always a good idea to test the clays you use at the temperature you fire
them at - to see if they are vitreous enough to exclude water in use. You
will at least know which uses your ware is useful at.
RR
>I've always fired my wares at the studio where I was taking classes (^10
>gas kiln) and I used Laguna B-mix (^10). I've now bought myself a used
>electric kiln (^10), but I still have 100 lbs of ^10 B-mix laying around.
>
>If I only fire the ^10 B-mix up to ^5 (to occasionally save energy) should
>I expect any adverse effects (easier breakability, etc)? Or should I save
>my ^10 clay for the ^10 firings and buy myself some ^5 clay?
>
>Thanks,
>Kristina
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
| |
|
