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Cavy Fire Studios

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  1. Like
    Cavy Fire Studios got a reaction from CarolynB in Cute Fox Bowl Wip (As Requested)   
    This bowl measures about 10" across and 3" tall. It's for my fella, who fancies himself a fox with corgi colors, and has a fondness for tea and coffee. ♥
    Main colors are Duncan EZ and Mayco Underglaze. Blacks are Clay Art Center's baltic black A and Amaco's black velvet (watered down for shading). This is greenware, Clay Art Center's X-Tra White.


  2. Like
    Cavy Fire Studios got a reaction from LeeU in Cute Fox Bowl Wip (As Requested)   
    This bowl measures about 10" across and 3" tall. It's for my fella, who fancies himself a fox with corgi colors, and has a fondness for tea and coffee. ♥
    Main colors are Duncan EZ and Mayco Underglaze. Blacks are Clay Art Center's baltic black A and Amaco's black velvet (watered down for shading). This is greenware, Clay Art Center's X-Tra White.


  3. Like
    Cavy Fire Studios got a reaction from Crusty in Almost There   
    I was wondering where you went! Congrats on the new pad! Totally jelly.
  4. Like
    Cavy Fire Studios got a reaction from Surubee in Cute Fox Bowl Wip (As Requested)   
    This bowl measures about 10" across and 3" tall. It's for my fella, who fancies himself a fox with corgi colors, and has a fondness for tea and coffee. ♥
    Main colors are Duncan EZ and Mayco Underglaze. Blacks are Clay Art Center's baltic black A and Amaco's black velvet (watered down for shading). This is greenware, Clay Art Center's X-Tra White.


  5. Like
    Cavy Fire Studios reacted to Mark C. in Opening Kiln Early   
    Some possible reasons to open kiln early
    Your rocket ship to space takes off in the next 30 minutes and you will not see your kiln load for 20 years until you return from Pluto
    The nearby volcano is erupting and lave is flowing towards our studio and you only have 15 minutes to get out
    Wildfire is coming your way and you have to evacuate
    The dike has failed and the flood Is 5 minutes away from your studio being flooded
    Your piece in kiln is for the presidents dinner party held in next few hours
    The last reason is you just heard about the asteroid which will end life on earth hitting in next few hours and you need to see your new dog bowl in kiln.
    Now if your reasons are lesser than those listed above I would consider just waiting until the pots are below 200 degrees
  6. Like
    Cavy Fire Studios reacted to MatthewV in Opening Kiln Early   
    Temperature (â°C) and Events
    100  Atmospheric water turns to steam as the piece completely dries
    300-800  Carbon, sulphur and organic materials burn off
    573 Quartz inversion occurs
    900 (cone 011) Sintering begins
    1060-1160 (cone 06-3) Earthenware firing range
    1170-1220 (cone 4-6) Mid-fire range
    1230-1350 (cone 7-14) Stoneware firing range
    220 On cooling only, cristobalite shrinks
     
     
    First Stage: Atmospheric Drying
    As a kiln is firing up and cooling down, the changes in temperature make some profound changes in the clay. The clay goes from this soft, totally fragile substance to one which is rock-hard, impervious to water, wind, and time. The change is nearly mystical in its complete metamorphosis, and might be deemed so if it were not so common.
    When pottery is placed into the kiln, it is almost always bone dry. However, there is still water trapped within the spaces between the clay particles. As the clay is slowly heated, this water evaporates out from the clay. If the clay is heated too quickly, the water will turn to steam right inside the clay body, expanding with explosive effect on the pot.
    By the time the boiling point of water (100â°C at sea level) is reached, the atmospheric water should have all evaporated out of the clay body. This will result in the clay compacting and some minimal shrinkage.
     
    Second Stage: Burn Off of Carbon and Sulphur
    Clay bodies all contain some measure of carbon, organic materials, and sulphur. These all to burn off between 300â° and 800â°C. If for some reason (such as poor ventilation within the kiln) these are not able to burn out of the clay body, carbon coring will occur, weakening the clay body considerably.
     
    Third Stage: Chemically Combined Water Driven Off
    Clay can be characterized as being a molecule of alumina and two molecules of silica bonded with two molecules of water. Even after the atmospheric water is gone, the clay still contains some 14% of chemically bonded water by weight. The pot will be substantially lighter, but with no physical shrinkage.
    This chemically combined water's bond loosens when heated. Overlapping the carbon and sulphur burn off, the chemically bonded water escapes from the clay body between 350â° and 800â°C. If the water heats too quickly, it again can cause the explosive production of steam inside the clay body. It is for all these changes and more that the firing schedule must allow for a slow build up of heat.
     
    Fourth Stage: Quartz Inversion Occurs
    Potters call it silica, but silica oxide is also known as quartz. Quartz has a crystalline structure that changes at specific temperatures. These changes are known as inversions. One such inversion occurs at 573â°C. The change in crystalline structure will actually cause the pottery to increase in size by 2% while heating, and loose this 2% as it cools. Ware is fragile during this quartz inversion and the kiln temperature must be raised (and later cooled) slowly through the change.
     
    Fifth Stage: Sintering
    Before the glass-making oxides begin to melt, the clay particles will already stick to each other. Beginning at about 900â°C the clay particles begin to fuse. This cementing process is called sintering. After the pottery has sintered, it is not longer truly clay but has become a ceramic material. Bisque firing usually is done at about 945â°C to 1050â°C (Cone 06 to 04 is recommended), after the ware has sintered but is still porous and not yet vitrified. This allows wet, raw glazes to adhere to the pottery without it disintegrating.
     
    Sixth Stage: Vitrification and Maturity
    The maturation of a clay body is a balance between the vitrification of the body to bring about hardness and durability, and so much vitrification that the ware begins to deform, slump, or even puddle on the kiln shelf. Vitrification is a gradual process during which the materials that melt most easily do so, dissolving and filling in the spaces between the more refractory particles. The melted materials promote further melting, as well as compacting and strengthening the clay body. It is also during this stage that mullite (aluminium silicate) is formed. These are long, needle-like crystals which acts as binders, knitting and strengthening the clay body even further.
     
    Maturation Temperatures
    The temperature a clay is fired to makes a tremendous difference. A clay fired at one temperature may be soft and porous, while that same clay fired at a higher temperature may be hard and impervious. It is also imperative to note that different clays mature at different temperatures, depending on their composition. A red earthenware contains a large amount of iron which acts as a flux. An earthenware clay body can fire to maturity at about 1000â°C and can melt at 1250â°C. On the other hand, a porcelain body made of pure kaolin might not mature until about 1390â°C and not melt until over 1800â°C.
     
    During Cooling
    Quartz inversion happens again the quartz structure returns at 573â°C.
    There is another event that glazed clay goes through, this time as it cools. That is the sudden shrinkage of cristobalite, a crystalline form of silica, as it cools past 220â°C. Cristobalite is found in all clay bodies, so care must be taken to cool the kiln slowly as it moves through this critical temperature. Otherwise, pots will develop cracks.
  7. Like
    Cavy Fire Studios reacted to oldlady in Opening Kiln Early   
    DON'T DO IT!
     
    THE WORLD AS WE KNOW IT WILL END!
     
    KEEP YOUR LITTLE HANDS UNDER CONTROL!
     
    THE KILN POLICE ARE WATCHING!
     
    WOULD YOU DO THAT TO A CAKE YOU ARE BAKING IN AN OVEN!!!!!
  8. Like
    Cavy Fire Studios reacted to MatthewV in What Clays To Begin Using   
    If Tacoma isn't too far away, the Clay Art Center is staffed by friendly potters. I think they have earned a reputation of being better that SPS.
     
    One 25 lb bag will last you a long time so the cost of porcelain. On small figurines the technical issues won't be an issue. It will carve and smooth very nicely.
  9. Like
    Cavy Fire Studios reacted to Crusty in Almost There   
    Finally, all moved in the new house.. Got the basement ready or at least able to start making pots again.. I never thought it would take this long..I did start a new job in the mean time, i really like it and i get more time off and make more $$$$ woot woot... Had to update our electric service and run proper electric to the kiln..Built a 12X16 covered deck in the back with a nice sized fire pit where we can do some wood/raku firings... Had to make a few minor repairs to the homestead then of course get past the holidays... We now have a pretty good start on a place where we can be happy and make different styles of pottery..
      Started throwing pots last week and like they say, its like riding a bike... One thing i noticed is that i am finding my balance.. Im not in a hurry to make a certain number of pots or to make the perfect pot.. I still stay with the normal "rules" so to speak but if something is a tad off here or there it dont bother me as much and i just go with it... I am finding a controlled looseness that i really enjoy... I can throw 20 of the same form and have the same dimensions yet no two are the same..Reminds me of Impressionism in paintings... 
  10. Like
    Cavy Fire Studios got a reaction from TLDinNC in Buying A New Wheel! ^_^ Yes!   
    It'll work well for my poor busted paws, though. I'm cool with wonky if it means I can still make stuff! ♥
  11. Like
    Cavy Fire Studios got a reaction from vinks in Qotw: Would You Ever Completely Retire From Doing Your Art Work?   
    I think the short answer to that is: "I'd rather die."
    For me...art is my soul, my reason. One doesn't simply "retire" from drawing breath... it's a part of you until the next world comes a-calling. :3
  12. Like
    Cavy Fire Studios got a reaction from GiselleNo5 in Qotw: Would You Ever Completely Retire From Doing Your Art Work?   
    I think the short answer to that is: "I'd rather die."
    For me...art is my soul, my reason. One doesn't simply "retire" from drawing breath... it's a part of you until the next world comes a-calling. :3
  13. Like
    Cavy Fire Studios reacted to neilestrick in Working Less-It Did Not Work Out   
    Mark Skywalker
     


  14. Like
    Cavy Fire Studios reacted to bciskepottery in Looking For An Artist To Re-Make A Piece For A Christmas Gift   
    Until I started working with clay, I had no idea of the time involved in making an item from block of clay to unloaded from glaze kiln. So, let's be not too quick to chortle when we get the short turnaround question or comment. Nor do I think asking to make a replacement is not too much. Yes, it will not have the personal attachment/sentiment of the original; but, it will carry a lot of new attachment/sentiment that someone thought enough to go to the trouble to have a replacement made. It may not be the object, but the thought behind it that counts more. (Okay, back to being the hardened, all business potter.)
  15. Like
    Cavy Fire Studios got a reaction from Mark (Marko) Madrazo in Teaching Opportunity - Help Needed!   
    Hell, I wish!! No way I'm moving to Texas, though. That place is scary...
  16. Like
    Cavy Fire Studios reacted to Dick White in Pyrometric Cones Or Bars?   
    In addition to the uniform physical dimensions of the bar vs. the variable thickness of the cone, the bars are designed to run a little hotter than the same number cone, to account for the additional heatwork flowing up and down the side edges of the kiln vs. in the middle of a shelf. The possible downside is that many walk-in supply shops do not carry the bars, only the mini-cones. If yours is one of the few that does carry them, you are in luck; otherwise you will need to order them from one of the usual online suspects.
  17. Like
    Cavy Fire Studios reacted to Pugaboo in My New Mugs With 2 New Hand Painted Pugs On Them   
    I just finished these new mugs and wanted to share!
     
    I mentioned elsewhere that I have designed a new mug size and shape for myself using my extruder and a plate I made as well. The photos show my new design. I have fired 1 blank prototype and it looked good so decided to go ahead and paint up a couple hand painted Pug mugs.
     
    To get this started, the mugs in the pictures were created using my Scott Creek extruder with the expansion box and a hollow wooden die I designed. The handle was also made with the extruder and a commercial handle die. Once the mug body was pulled I added the slab bottom and the paddled the mug into a more pleasing shape. Well a more pleasing shape to me anyway since the extruded blank looked more like a stein than a mug. I gave it a nice round bottom portion with a waist that flows out into a nice curved lip. The handles were added added after the paddling. I didn't do anything too extreme to it as I need a surface I can paint on as well as get my transfers to adhere to but wanted more of a curvy shape to it.
     
    The Pugs are free hand painted onto the surface, I just kind of made the first one up as I went along. After I got the first one done I then decided to try the same basic design but with a black Pug instead of a fawn. I didn't try to go for an exact duplicate, that's what transfers are for, I just wanted to use the same theme but with a different colored Pug. I painted the entire circumference of the mugs since I like a design that flows all the way around, I even decorated the handle.
     
    I ran out of room to upload but I have even been working on a nice signature to hand sign my one of a kind pieces. This means even the bottom looks nice and I plan to take this even further as I see how the bottom fairs in the kiln.
     
    I am calling this design Pug Blossoms and Bees. I haven't hand painted a lot of my mugs up until now as I haven't been real pleased with my mug results, I mean they were okay but the surface wasn't right for a handpainted image they needed to be fatter to give me more room to paint. I've done loads of boxes and some platters but not mugs.
     
    The mugs are still drying so the colors in the photo will be more vibrant once I get them fired and then clear glazed. Am planning on a classic white interior and I will use Amacos Zince Free Clear on the exterior.
     
    Oh and excuse the photos I snapped some quick pics when I finished today. I like to do this when I am working with a new design because all kinds of things show up in a picture that I never noticed while I was looking at it, it's kind of a way for me to check myself.
     
    Terry






  18. Like
    Cavy Fire Studios got a reaction from cambriapottery in Amaco Underglaze Velvets And Low Fire Clear Glaze Question   
    Yeeeeah, thing with Velvets is that they are designed specifically to not form a solid line. That's perfectly okay, if you're looking for a softer application (works GREAT for fur, and also shading wash, when watered down), but if you're looking for BOLD, BRIGHT color, I cannot speak more highly of Clay Art Center of Tacoma's underglazes. They are so bold, it's almost like Copic or Prismacolor professional markers. I've dedicated my whole ceramic career to finding a perfect underglaze combination for my technique, and if you have ANY underglaze questions, this rodent lady is aaaall guinea pig ears!
    This dragon was outlined in CACT's Baltic Black A and shaded with Amaco's Velvet black (varying UG:water ratios).
     
    And... my clear has a buncha zinc. >.<
    It eats purples pretty bad.
    Has flint, EPK, and gerstley borate...
     


  19. Like
    Cavy Fire Studios reacted to S. Dean in Can You Identify Me?   
    Since you mention that the wheel is old and broken, you should know that Creative Industries was bought by Speedball. However, they only bought and support certain wheel lines and parts/help on the really old CI wheels is "unobtanium".  
  20. Like
    Cavy Fire Studios got a reaction from GiselleNo5 in Wood Duck Mug Wip   
    EEEEEEEEEEE!!! I just pulled them from the bisque and you guys are gonna FREAK when I slap some glaze on these beauties!! ♥♥♥
  21. Like
    Cavy Fire Studios reacted to oldlady in Wood Duck Mug Wip   
    you have captured the essence of owl.
  22. Like
    Cavy Fire Studios got a reaction from florence w in Wood Duck Mug Wip   
    I think that throwing and illustrating are both equally ouchies, just in different spots! I'm waaaay too much of a control freak to allow someone to throw for me, anyway; last time I did that, 4/5 of the mugs she threw s-cracked in the bisque... >.< My illustrations were wasted...
     
    Here's the second WIP: a horned owl in a funny-shaped bowl. The duck was a way huger pain (it had so dang many colors), but I'm proud of this guy, too. ♥♥♥
     


  23. Like
    Cavy Fire Studios got a reaction from islandawg in Wood Duck Mug Wip   
    I think that throwing and illustrating are both equally ouchies, just in different spots! I'm waaaay too much of a control freak to allow someone to throw for me, anyway; last time I did that, 4/5 of the mugs she threw s-cracked in the bisque... >.< My illustrations were wasted...
     
    Here's the second WIP: a horned owl in a funny-shaped bowl. The duck was a way huger pain (it had so dang many colors), but I'm proud of this guy, too. ♥♥♥
     


  24. Like
    Cavy Fire Studios got a reaction from flowerdry in Wood Duck Mug Wip   
    I think that throwing and illustrating are both equally ouchies, just in different spots! I'm waaaay too much of a control freak to allow someone to throw for me, anyway; last time I did that, 4/5 of the mugs she threw s-cracked in the bisque... >.< My illustrations were wasted...
     
    Here's the second WIP: a horned owl in a funny-shaped bowl. The duck was a way huger pain (it had so dang many colors), but I'm proud of this guy, too. ♥♥♥
     


  25. Like
    Cavy Fire Studios got a reaction from CarolynB in Wood Duck Mug Wip   
    I think that throwing and illustrating are both equally ouchies, just in different spots! I'm waaaay too much of a control freak to allow someone to throw for me, anyway; last time I did that, 4/5 of the mugs she threw s-cracked in the bisque... >.< My illustrations were wasted...
     
    Here's the second WIP: a horned owl in a funny-shaped bowl. The duck was a way huger pain (it had so dang many colors), but I'm proud of this guy, too. ♥♥♥
     


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