not trying to sound offensive, but the reason why glass runs is the same reason glaze runs XD they have the similar components :3 but yeah XD just pointing out the obvious :D
Most glasses have a much lower temperature of fusion and a high coefficient of expansion relative to high-fired glaze. Glaze is "glass-like" (vitreous), but because it must remain viscous to adhere to the vessel, it does not melt like a typical glass. The danger of using glass in fired ceramics is that if it pools too thickly, the crazing caused by different shrinkage rates can either break the vessel, or cause bits of glass to come loose over time.
do some research as to the melting temperature of the glass you are using opposed to the firing temp of the clay body. YOu may find it is better to fire the glass onto bisque. I'm a long time glass and clay artist. Have fun. Barb
WOW! amazing my art teacher said it is impossible to melt glass and clay. I have to disagree with her, after research. So do you fire the bowl first? and next fire the glass at a high temp for 2 hours and then let it cool down for 8 hours? I'm so new! to this process I need help!!!
I am still fairly new to this world of pottery---but had a question as I was about to try the same thing....what if you applied the glass to an already glazed piece and used a lowere cone/heat? If you glazed at cone 04 what if you applied the glass then and did a cone 06??? DIdn't know if I was being too elelmentary---but thought it might work.--meanwhile I love the cylinder even with the "runs"....I think random is awesome! And how did the bowl/plate do?
I love the direction you are going with your work. I have use fusetion glass in the past, and it melts at around a cone 6. but I only use it on my lidded handles its hard to describe. but its like a small bowl ontop of the lid and I place the glass inside so the glass dosen't run all over the place. keep up the good work.
thanks for the advice. For now, I'm not doing much with glass... I am experimenting now with slips... I'm sure I'll get back to glass someday... there is never a dull moment.
Putting the glass near the rim and maybe using a stiff glaze like a matt(from being under fired) would slow the run down. I would once fire them if they are sturdy enough to glaze before bisque. Keep experimenting.
I definately think that putting the glass towards the rim would have made a much better effect. I tend to get nervous about once firing for some reason, but in this case, I can see your point as to why that would be to the advantage.
I think we have some pieces lying around the throwing lab with glass infused into them. I'm pretty sure they're from a workshop/demo done by one of the big ceramic artists who come to Junction, but I can't tell you what their name is. Those pieces were propped up on wadding so the glass ran sideways across the cylinder instead of down. The glass looked kind of murky and bleh, though, and I think I remember my intro prof telling me they didn't know what cone to fire them to, so it messed up.
I thought so. I knew those glass tiles would run. That is all good though. This is the way we learn. I will be very anxious to see what happens with this bowl. Transparent glaze is an interesting solution. Let's see what happens!!! LOL
Agree about that bisque - the drops sticking on are rather too big.
That porcelain bowl looks FAB!!!! Glass melts so much lower than clay, so I would be tempted to try at around 800 C. Possibly the clear glaze will glaze up at that temp. Try lower first!
bowl looks to me like it has possibilities! I was reading about glass slumping the other day and I think the slump temp was around 1500f,(dont remember exactly) and there was some hold time involved. you might want to investigate glass slumping/fusing process and fire about to that, then lowfire clear glaze to finish if you want If you fire to the clay maturation the glass will probably do what you said - get gucky and cratery
Just a thought...why don't you put a flat disk of clay or a saucer under the cup and turn it upside down to get the glass to run back toward the top, then glaze it with low fire and fire glaze fire it.
I made some flat seasonal ornaments with tiny glass beads on them and the glass melted but didn't stick well. I put a low fire clear glaze over and re-fired and the glass melted and infused throughout the glaze. Where I used a single color bead it was cool, the rest became dark multi color.
not trying to sound offensive, but the reason why glass runs is the same reason glaze runs XD they have the similar components :3 but yeah XD just pointing out the obvious :D
sailorevaman2222 4 months ago
If you turned the cup upside down, it would even out the bubbles at the bottom to be more smooth and flat... I think.
Artdeleonardow1 9 months ago
Most glasses have a much lower temperature of fusion and a high coefficient of expansion relative to high-fired glaze. Glaze is "glass-like" (vitreous), but because it must remain viscous to adhere to the vessel, it does not melt like a typical glass. The danger of using glass in fired ceramics is that if it pools too thickly, the crazing caused by different shrinkage rates can either break the vessel, or cause bits of glass to come loose over time.
petertwang 11 months ago
do some research as to the melting temperature of the glass you are using opposed to the firing temp of the clay body. YOu may find it is better to fire the glass onto bisque. I'm a long time glass and clay artist. Have fun. Barb
naasglass 11 months ago
need to us fused paper after your firing of the clay then fire the glass. sp
63Parsley 1 year ago
WOW! amazing my art teacher said it is impossible to melt glass and clay. I have to disagree with her, after research. So do you fire the bowl first? and next fire the glass at a high temp for 2 hours and then let it cool down for 8 hours? I'm so new! to this process I need help!!!
Menomineebuzz 1 year ago
please show results !
look4art 2 years ago
did i miss the results of the bowl....?
bittergreen 2 years ago
Hi OffCenter----
I am still fairly new to this world of pottery---but had a question as I was about to try the same thing....what if you applied the glass to an already glazed piece and used a lowere cone/heat? If you glazed at cone 04 what if you applied the glass then and did a cone 06??? DIdn't know if I was being too elelmentary---but thought it might work.--meanwhile I love the cylinder even with the "runs"....I think random is awesome! And how did the bowl/plate do?
jeeperkd 3 years ago
my advice would be to use stiff colors eg transparents and white so that the color doesnt run as much
ramanglass544 3 years ago
I love the direction you are going with your work. I have use fusetion glass in the past, and it melts at around a cone 6. but I only use it on my lidded handles its hard to describe. but its like a small bowl ontop of the lid and I place the glass inside so the glass dosen't run all over the place. keep up the good work.
Jim prince george canada
functionalmud 3 years ago
thanks... I need to play with glass a little more... I haven't done much with it lately. Thanks for your comment.
offcenteredpotter 3 years ago
Hello, Ive been using glass for many years with my ceramics. you gotta remember glass is a glaze in another form.
I used glass as stainedglass artist. You would put the glass in after your finished your fireing.
To give a spark to the glass glue some foil to the back of the glass blob. but don't tell anybody it's the Mr.Chun's secret.
cmikehere 3 years ago
thanks for the advice. For now, I'm not doing much with glass... I am experimenting now with slips... I'm sure I'll get back to glass someday... there is never a dull moment.
offcenteredpotter 3 years ago
Putting the glass near the rim and maybe using a stiff glaze like a matt(from being under fired) would slow the run down. I would once fire them if they are sturdy enough to glaze before bisque. Keep experimenting.
timseepots 3 years ago
I definately think that putting the glass towards the rim would have made a much better effect. I tend to get nervous about once firing for some reason, but in this case, I can see your point as to why that would be to the advantage.
offcenteredpotter 3 years ago
Well..... it's in the kiln right now. So, we shall see....
offcenteredpotter 3 years ago
I think we have some pieces lying around the throwing lab with glass infused into them. I'm pretty sure they're from a workshop/demo done by one of the big ceramic artists who come to Junction, but I can't tell you what their name is. Those pieces were propped up on wadding so the glass ran sideways across the cylinder instead of down. The glass looked kind of murky and bleh, though, and I think I remember my intro prof telling me they didn't know what cone to fire them to, so it messed up.
YamiTami 3 years ago
I thought so. I knew those glass tiles would run. That is all good though. This is the way we learn. I will be very anxious to see what happens with this bowl. Transparent glaze is an interesting solution. Let's see what happens!!! LOL
:-)
wizzlewolf 3 years ago
Agree about that bisque - the drops sticking on are rather too big.
That porcelain bowl looks FAB!!!! Glass melts so much lower than clay, so I would be tempted to try at around 800 C. Possibly the clear glaze will glaze up at that temp. Try lower first!
Marihani 3 years ago
bowl looks to me like it has possibilities! I was reading about glass slumping the other day and I think the slump temp was around 1500f,(dont remember exactly) and there was some hold time involved. you might want to investigate glass slumping/fusing process and fire about to that, then lowfire clear glaze to finish if you want If you fire to the clay maturation the glass will probably do what you said - get gucky and cratery
ChumleyWhiplash 3 years ago
Just a thought...why don't you put a flat disk of clay or a saucer under the cup and turn it upside down to get the glass to run back toward the top, then glaze it with low fire and fire glaze fire it.
I made some flat seasonal ornaments with tiny glass beads on them and the glass melted but didn't stick well. I put a low fire clear glaze over and re-fired and the glass melted and infused throughout the glaze. Where I used a single color bead it was cool, the rest became dark multi color.
potterybyjohn 3 years ago
What a pity
But cool discoveries come with experimentation. Thanks for sharing these experiments with us!
I'm always curious as to what you're up to next...lol
bottlewasher37 3 years ago 2
I agree with every word. Well put bottlewasher.
TinkTheHustler 3 years ago
once I saw somebody doing the same with glass marbles and firing at 900C.
The marbles were almost unchanged, only lost their gloss.
How high did you fire the bisque?May be you should go lower to prevent the running.
monkeybss 3 years ago