If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message news -snip- Glad you are feeling better. If I get any snow over here in Zurich, I will HAPPILY send it your way! ;-) How does this glaze behave over or under other glazes? If they have sold you a glaze that is not maturing at the temperature they claim then bad on them (you should not have to fire higher than what they say it fires to). Is there a reason you are sticking with this glaze when it is behaving badly? The reason I ask these questions is that depending on why you are keeping this glaze and how it behaves with other glazes - there might be short term fixes. All the glazes I use behave very well normally. It is just with this "beautifier" on top that I get the bubbles. It may be that I am putting too much on. I am currently making up a bunch of tiles that I will criss-cross with different thicknesses of glaze and beautifier to have a more accurate example of what happens with the thicknesses/combinations. Marianne |
Ads |
#22
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message news P.S. I also like this room better because you are more likely to get a response (even if it is maybe more likely not to be corrected if it is wrong) and you can easily follow threads. I hate the inability to keep a thread together in Clayart. I posted your original question there and never did get a response. There is quite a bit of chatter though on all sorts of odds and ends I would never want to follow. Still, if you can at least do searches there, I think you would find it useful and that is where you would pick up the pearls by the experts. As it turns out really - most questions you would ever ask have already been asked and the ones that haven't are usually impossible to answer. I absolutely agree with you that clayart is a good resource. The trouble is that it is rather messy to search and you get a lot of things you don't want. Partly my fault for not putting in the parameters better, but still. Also, this bubble problem is very specific, so I did want a dialogue - and I am not about to post over on clayart - got too many places to post already in different subjects. But I thank you for posting there for me, and am sorry nobody gave any feedback. Marianne |
#23
|
|||
|
|||
Chemistry basics for potters?
"Bubbles_" wrote in message ... "DKat" wrote in message news -snip- Glad you are feeling better. If I get any snow over here in Zurich, I will HAPPILY send it your way! ;-) How does this glaze behave over or under other glazes? If they have sold you a glaze that is not maturing at the temperature they claim then bad on them (you should not have to fire higher than what they say it fires to). Is there a reason you are sticking with this glaze when it is behaving badly? The reason I ask these questions is that depending on why you are keeping this glaze and how it behaves with other glazes - there might be short term fixes. All the glazes I use behave very well normally. It is just with this "beautifier" on top that I get the bubbles. It may be that I am putting too much on. I am currently making up a bunch of tiles that I will criss-cross with different thicknesses of glaze and beautifier to have a more accurate example of what happens with the thicknesses/combinations. Marianne Back step.... I'm sorry, I totally misunderstood what you were doing. What is a beautifiers? That completely changes things. When glazes are too thick you will get bubbling - so if you are layering your glazes and then putting this last layer on rather thickly I would not be surprised to see bubbles. Have you taken a needling tool to check how thick your glazes are (the final product)? |
#24
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message ... "Bubbles_" wrote in message ... "DKat" wrote in message news -snip- Glad you are feeling better. If I get any snow over here in Zurich, I will HAPPILY send it your way! ;-) How does this glaze behave over or under other glazes? If they have sold you a glaze that is not maturing at the temperature they claim then bad on them (you should not have to fire higher than what they say it fires to). Is there a reason you are sticking with this glaze when it is behaving badly? The reason I ask these questions is that depending on why you are keeping this glaze and how it behaves with other glazes - there might be short term fixes. All the glazes I use behave very well normally. It is just with this "beautifier" on top that I get the bubbles. It may be that I am putting too much on. I am currently making up a bunch of tiles that I will criss-cross with different thicknesses of glaze and beautifier to have a more accurate example of what happens with the thicknesses/combinations. Marianne Back step.... I'm sorry, I totally misunderstood what you were doing. What is a beautifier? That completely changes things. When glazes are too thick you will get bubbling - so if you are layering your glazes and then putting this last layer on rather thickly I would not be surprised to see bubbles. Have you taken a needling tool to check how thick your glazes are (the final product)? Spelling correction - and - have you tried thinning the beautifier down quite a bit and doing overlapping brush strokes so you get different thicknesses of the beautifier to test the application? Donna |
#25
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message ... Back step.... I'm sorry, I totally misunderstood what you were doing. What is a beautifiers? That completely changes things. When glazes are too thick you will get bubbling - so if you are layering your glazes and then putting this last layer on rather thickly I would not be surprised to see bubbles. Have you taken a needling tool to check how thick your glazes are (the final product)? Okay. I paint all my glazes on and have them in little pots ready for that purpose. Dip-glazes take way more space than I have available! The beautifier, which only works with stoneware 1250 C glazes is an addition. It is white in color and quite liquid. If I thin it down, the effect is less as well. This stuff makes the glazes run if it is put on "too" thick and gives wonderful results. Never heard of checking final thickness of glazes. Any idea where I can get hold of that tool= Hugs Marianne |
#26
|
|||
|
|||
Chemistry basics for potters?
Ok, another idea - try firing the piece once with the first glaze. Then
paint on the 'beautifier' (that is just such a weird term) and fire again. See what happens in that case. "Bubbles_" wrote in message ... "DKat" wrote in message ... Back step.... I'm sorry, I totally misunderstood what you were doing. What is a beautifiers? That completely changes things. When glazes are too thick you will get bubbling - so if you are layering your glazes and then putting this last layer on rather thickly I would not be surprised to see bubbles. Have you taken a needling tool to check how thick your glazes are (the final product)? Okay. I paint all my glazes on and have them in little pots ready for that purpose. Dip-glazes take way more space than I have available! The beautifier, which only works with stoneware 1250 C glazes is an addition. It is white in color and quite liquid. If I thin it down, the effect is less as well. This stuff makes the glazes run if it is put on "too" thick and gives wonderful results. Never heard of checking final thickness of glazes. Any idea where I can get hold of that tool= Hugs Marianne |
#27
|
|||
|
|||
Chemistry basics for potters?
Put a scatch in the glaze with your nail. Also your glazes will thicken
over time and need to be thinned. How much glaze do you have and do you have a scale? "Bubbles_" wrote in message ... "DKat" wrote in message ... Back step.... I'm sorry, I totally misunderstood what you were doing. What is a beautifiers? That completely changes things. When glazes are too thick you will get bubbling - so if you are layering your glazes and then putting this last layer on rather thickly I would not be surprised to see bubbles. Have you taken a needling tool to check how thick your glazes are (the final product)? Okay. I paint all my glazes on and have them in little pots ready for that purpose. Dip-glazes take way more space than I have available! The beautifier, which only works with stoneware 1250 C glazes is an addition. It is white in color and quite liquid. If I thin it down, the effect is less as well. This stuff makes the glazes run if it is put on "too" thick and gives wonderful results. Never heard of checking final thickness of glazes. Any idea where I can get hold of that tool= Hugs Marianne |
#28
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message ... Ok, another idea - try firing the piece once with the first glaze. Then paint on the 'beautifier' (that is just such a weird term) and fire again. See what happens in that case. Good idea. Means firing the piece 3 times in all, though, instead of just twice. Maybe I should take hubby up on his offer of buying me a bigger kiln! Marianne |
#29
|
|||
|
|||
Chemistry basics for potters?
"DKat" wrote in message ... Put a scatch in the glaze with your nail. Also your glazes will thicken over time and need to be thinned. How much glaze do you have and do you have a scale? I do have to add a little water to them now and then, for sure. I have close to 40 high-fire glazes and around 12 low-fire glazes - plus some underglazes colors. I have an old kitchen scale that I use to weigh my clay before I dump it on the wheel. It weighs up to 2 kilos. Happy weekend! Marianne |
#30
|
|||
|
|||
Chemistry basics for potters?
You so DON'T sound like the amateur you pretend to be...
Donna "Bubbles_" wrote in message ... "DKat" wrote in message ... Put a scatch in the glaze with your nail. Also your glazes will thicken over time and need to be thinned. How much glaze do you have and do you have a scale? I do have to add a little water to them now and then, for sure. I have close to 40 high-fire glazes and around 12 low-fire glazes - plus some underglazes colors. I have an old kitchen scale that I use to weigh my clay before I dump it on the wheel. It weighs up to 2 kilos. Happy weekend! Marianne |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Back to basics | Marion Pearcey | Machine Knit | 4 | May 22nd 05 05:00 PM |
Beading Basics | [email protected] | Needlework | 5 | April 21st 05 03:07 PM |
ash glaze chemistry ? | Beowulf | Pottery | 7 | March 17th 04 06:36 PM |
AD: Taos Tesserae and Strange Glow/Experiments in Chemistry | Susan B. | Beads | 7 | November 21st 03 08:52 PM |
elma ox-hydrogen chemistry ? | ilaboo | Jewelry | 3 | October 28th 03 04:43 AM |