Pottery beginner, need help.
Piotrek_warszawa
Thanks in advance.
PS
I know that higher the temperature the harder it will be...
annemarie
"Piotrek_warszawa" <gri...@tlen.pl> wrote in message
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It depends on the clay. Different clays need different temperatures.
DKat
anything other than decoration but that would be the minimum "firing" temp
for pottery. You can also do pit fires which are lowfire.
some samples
http://www.uwm.edu/Dept/ArchLab/experimental/pitfiring_2003.html
http://grafik.sdsu.edu/ceramicsweb/articles/primitive.html
http://www.ccds.charlotte.nc.us/green/firing&.htm (nice page)
WHAT HAPPENS AS CLAYS AND GLAZES ARE FIRED
100oC Water boils.
100-200oC Clays lose "mechanical water."
200oC Typical kitchen oven baking temperature.
374oC "Critical" temperature of water. Chemically combined water leaves
clay.
500oC Red glow in kiln.
573oC "Quartz inversion"
SLOW, CAREFUL FIRING UNTIL 600oC
800oC D015 Organic matter in clay burns out.
800-1000oC D015-07 Orange color in kiln. Low-fire earthenwares and lowfire
lead glazes mature. Normal firing temperature for red bricks, flower pots.
1000-1160oC D07-1 Yellow color in kiln. High-fire earthenwares mature.
Feldspars begin to melt.
1170-1190oC D3-4 Bright yellow-white color in kiln. Mid-range clays and
low-fire stonewares mature. High iron-content clays begin to melt.
1250-1285oC D7-9 White color in kiln. Stoneware clays vitrify, feldspathic
glazes mature.
1285-1350oC D9-13 High-fire stonewares, porcelains vitrify.
MOST STUDIO POTTERY IS FIRED TO D9 OR LOWER.
1712oC Silica melts
2050oC Alumina melts
--
"As democracy is perfected, the office of president represents, more and
more closely, the inner soul of the people. On some great and glorious day
the plain folks of the land will reach their heart's desire at last and the
White House will be adorned by a downright moron."
- H. L. Mencken (1880 - 1956)
"Piotrek_warszawa" <gri...@tlen.pl> wrote in message
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Piotrek_warszawa
Thats All I wanted to know.
Oh one more thing...
I noticed that I have non typical oven :-)
My oven has 300oC (temperature counter ends on 300 i guess that it can
make some more heat ;-) )
DKat
would not do anything but dry out the pot on most clays potters use (600 is
where you begin to get things going on I believe...)
Although the oven clay is not really clay I have been impressed with what
can be done with it. I especially like the affect that mimics glass - I
cannot remember the name of the technique but for glass you take and do
layers of different colors of class (often pinching in the ball of glass on
one layer to then give the next layer different depths of color. When you
get enough layers of different colors and the glass is hot you have two
people with an iron rod attached to both ends of the glass run like hell
away from one another. This stretches the glass out to thin rods that can
the be sliced and used to 'tile' a piece of glass that is then blown. It is
much easier to do with the synthetic clay....
http://www.jaedworks.com/clayspot/polyclay-faq/basics.html
--
"As democracy is perfected, the office of president represents, more and
more closely, the inner soul of the people. On some great and glorious day
the plain folks of the land will reach their heart's desire at last and the
White House will be adorned by a downright moron."
- H. L. Mencken (1880 - 1956)
"Piotrek_warszawa" <gri...@tlen.pl> wrote in message
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Charles Spitzer
"DKat" <dsp...@hotmail.com> wrote in message
news:42374077$1...@marge.ic.sunysb.edu...
> That would be 572F and most ovens that I know of go to 500F.... still it
> would not do anything but dry out the pot on most clays potters use (600
> is where you begin to get things going on I believe...)
>
> Although the oven clay is not really clay I have been impressed with what
> can be done with it. I especially like the affect that mimics glass - I
> cannot remember the name of the technique but for glass you take and do
> layers of different colors of class (often pinching in the ball of glass
> on one layer to then give the next layer different depths of color. When
> you get enough layers of different colors and the glass is hot you have
> two people with an iron rod attached to both ends of the glass run like
> hell away from one another. This stretches the glass out to thin rods
> that can the be sliced and used to 'tile' a piece of glass that is then
> blown. It is much easier to do with the synthetic clay....
pulling cane
jedi
"Charles Spitzer" <charlie...@nospam.stratus.com> wrote in message
news:d17fuq$39n$1...@transfer.stratus.com...
>
> "DKat" <dsp...@hotmail.com> wrote in message
> news:42374077$1...@marge.ic.sunysb.edu...
> > That would be 572F and most ovens that I know of go to 500F.... still it
> > would not do anything but dry out the pot on most clays potters use (600
> > is where you begin to get things going on I believe...)
> >
> > Although the oven clay is not really clay I have been impressed with
what
> > can be done with it. I especially like the affect that mimics glass - I
> > cannot remember the name of the technique but for glass you take and do
> > layers of different colors of class (often pinching in the ball of glass
> > on one layer to then give the next layer different depths of color.
When
> > you get enough layers of different colors and the glass is hot you have
> > two people with an iron rod attached to both ends of the glass run like
> > hell away from one another. This stretches the glass out to thin rods
> > that can the be sliced and used to 'tile' a piece of glass that is then
> > blown. It is much easier to do with the synthetic clay....
>
> pulling cane
>
them as well.... Looks kinda like an old fashion quilt.
>
Charles Spitzer
"jedi" <ligh...@hotmail.com> wrote in message
news:JWLZd.4248$Vf3....@fe10.lga...
not quite. you make a brick or rod of glass somehow. you can either build it
up with rods, strips, frit, etc, then melt it together in a flame or kiln.
that's called a cane. attach a punty or grab it with plier-like tools on
each end. heat up in a flame and pull making it be very thin. pulling cane.
you then take the long rod, cut it into slices (saw, nippers, glass cutter,
etc). these slices are called millifiori. you then use these slices in
making other objects (paperweights, bowls, etc).
DKat
talking about is called Millefiore or Murano glass. Thanks for the lead.
DK
http://store.yahoo.com/fossilflyimports/gisu.html
http://www.mcstx.com/beads.html
Millefiori, meaning "A Thousand Flowers" is small segments of differently
shaped and colored glass rods, laid close together and then fused into tiny
mosaics, each of them being unique. Each piece is a one-of-a-kind work of
art, entirely handmade.
"jedi" <ligh...@hotmail.com> wrote in message
news:JWLZd.4248$Vf3....@fe10.lga...
>
DKat
>>> pulling cane
>>>
>> And what is the finished piece called? They used to do paperweights with
>> them as well.... Looks kinda like an old fashion quilt.
>
> not quite. you make a brick or rod of glass somehow. you can either build
> it up with rods, strips, frit, etc, then melt it together in a flame or
> kiln. that's called a cane. attach a punty or grab it with plier-like
> tools on each end. heat up in a flame and pull making it be very thin.
> pulling cane. you then take the long rod, cut it into slices (saw,
> nippers, glass cutter, etc). these slices are called millifiori. you then
> use these slices in making other objects (paperweights, bowls, etc).
Not quite what? When I was a child they used to make quilts from pieces of
fabric that were cut, shaped and formed around of all things on bottle caps.
These were pieced together and looked just like the pieces of glass works
I'm referring to that were around quite a bit at the same time.
For the glass pieces that I'm talking about the canes were cut into slices
that were put together much like you would form a pattern for a quilt. This
'grid' of glass pieces had a liquid glass 'ball' (yes I'm making the jargon
up because I can't remember what we called it) pressed onto it. You could
then leave it as a solid piece (paper weight) or blow it out as a bowl,
vase, etc.
http://users.ticnet.com/mikefirth/paperwts.htm#SETUP Look at the second
item down the page. Then look at the bottom of the page to see how it is
constructed.
Charles Spitzer
description on how to make cane
http://www.museum.state.il.us/exhibits/barker/techniques/tech_millefiori.php
the finished slice of cane is called millifiori. it isn't usually seen by
itself, but used in producing other things, like
encasing it in clear to make a paperweight, or laying out on a heated flat
metal surface and picking them up with a glass bubble on a blowpipe, or
arranging a bed of them inside a ring mold, then fusing it in a kiln to make
a flat blank of solid glass, then forming that blank in a ceramic mold or
blowing it out to make a bowl,