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    Houston Texas
  1. Adding Color To Clay

    thank you both so much! I learned a lot reading on your site Chris : )
  2. Adding Color To Clay

    I have some commercial earthenware and I'm wanting to change the color of some of the clay to black so that I can marbleize the two colors together. Can I use mason stains in commercial clay? Is is possible to wedge in black underglaze?
  3. My Underglaze Smells Like Sulfur!

    Are you serious!!! The smell is so intense I feel like I'm getting a disease from it! It's pretty gross. I don't think I could bare to open it to use it.
  4. I have a fairly new bottle of amaco white underglaze. I haven't used it in a few weeks and when I went to get it I noticed through the bottle that the color was a grayish color. I shook it up, thinking it just needed a good shake. The gray color remained so I opened the bottle and the most awful sulfur smell came out. My entire studio smells horrible. Why did this happen? I keep all glazes inside. I've never had this happen before and I've used this same underglaze in the past. Thoughts?
  5. I recently started using duncan premium gold luster on some of my pieces. I'm finding that there is confusing information about the fumes, both before and during firing, and whether or not it is toxic to breathe. According to dogwoodceramics.com "Health & Safety 1. Overglazes contain solvents and should be used in a well-ventilated area. Those susceptible to odors (such as pregnant women) should be especially careful to work only in areas with an adequate ventilation system. During firing, odors are not dangerous but can be offensive. These odors quickly leave the area; however, you should not work in the kiln area during firing. 2. Duncan Overglazes can be used on surfaces that come into contact with food and drink. Care must be taken to avoid hard scrubbing when washing overglazed ware, because of the possibility of scraping off the thin layer of metal or luster. Treat your overglazed pieces as you would fine china. Although overglazed ware will take repeated washings in a dishwasher, the overglaze will eventually wear away. 3. Caution. Do not place pieces with metallic overglazes into a microwave oven. As with any metallic surface, they could cause sparks." ============================= I apply outside, and though the smell is apparent, it is not overbearing..keep in mind I'm only accenting with the gold. Should I be wearing a mask while applying? What about during firing? I only go outside to turn the kiln up so I'm in contact with the fumes 99.9% of the time. So what are your thoughts? I've now read that the fumes are VERY dangerous and that the fumes are not dangerous. Will like to hear your thoughts on this. Thanks, Casi
  6. Mold Making

    Okay I'll move the mold indoors with a fan on it. : )
  7. Mold Making

    150F is too hot. It will degrade the plaster. Per manufacturer's recommendations, stay below 120F. Dry, moving air is more important than heat. It's practically already 90 degrees outside here in Houston. I'll just be on the safe side and let it dry naturally for another week. Very good tip though!
  8. Mold Making

    Okay thanks everyone...I was pretty sure it was too soon to pour but just had to ask from more experienced potters. Thanks again!!
  9. Mold Making

    Hello again! I made a two piece mold, the size is 5x5. I am wondering how long do I need to wait before I can pour it? I have had it outside in the bright sun for the past 4 days, though the plaster still feels a little moist. I'm really anxious to pour it!!
  10. Crazing On Mugs Only!

    My crazing is OVER!!!!! I went back to using my local slip and it worked!! My pieces are perfectly craze free : ) Thank you everyone for the advice!!
  11. Crazing On Mugs Only!

    Having tried only 2 clear glazes on 1 body and expecting a perfect fit is a bit of a long shot. Might be an idea to follow John's excellent post about matching body and glaze to fit. Your current glazes have too high a rate of expansion and contraction, you need a lower expansion glaze to fit your slipware without crazing. I've actually used 3 different clear glazes, but the first (which worked), was discontinued. I'm using commercial glaze so the ingredients are not noted, therefore it's more difficult to find a low expansion glaze. I'm switching slips tomorrow and will see if this helps.
  12. Crazing On Mugs Only!

    Well the new clear glaze isn't working either. The crazing is not has severe, however it is still crazing and therefore unsellable. I'm guessing my next step is to try a different slip company? If this doesn't work I have no idea what else to do. : (
  13. Crazing On Mugs Only!

    There is no crazing down the seam, just down the handle, around the handle, and around the top rim. I am using commercial glaze, therefore changing the recipe is not something I can do. I have ordered a different clear glaze, hoping this will solve the issue.
  14. Crazing On Mugs Only!

    This is the slip I am using http://www.dickblick.com/products/amaco-no-15-s-casting-slip/ This is the clear glaze I am using http://www.dickblick.com/products/amaco-lg-series-liquid-gloss-glazes/ Though both say to fire on bisque 05 I was told by my local ceramic supplier that I could fire using my cone 04? I trusted her knowledge, being she's been a potter for 20+years...So could this be my issue? I went ahead an bought from a different shop a new clear glaze that says 04 bisque..should receive this new glaze in a few days. Should I also buy some 05 cones to test with? http://www.clay-king.com/glazes_ceramic_pottery/duncan/pure_brilliance.html
  15. Crazing On Mugs Only!

    Okay here are two pictures of the crazing(I stained the crazing with tea so its a little darker and easier to see the cracks). I have concluded it is the clear glaze that is causing it. I am using Amaco LG-10 clear glaze. I have bought a new clear glaze by Duncan(ordered online so it should be here in a few days), so I hope this fixes the problem. I have a ceramic store online that sells a lot daily and can't afford to keep ruining pieces. What else can I do? I fire bisque to 04---- low with lid prop for 1.5 hours. Then on medium for 1 hour with lid prop, then 30mins with lid closed (peep hole still open), then on high until shut off. Usually takes 5hours for a bisque fire. I have a small 120v kiln. I fire glaze to 06-----low with lid closed (peep hole open) for 1.5 hours. Medium with lid closed,peep hole closed for 1.5 hours, then high until shut off. Usually takes 4-5 hours.