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  1. Sometimes I've noticed the recycled clay being short, I use it for small pots... The local supplier doesn't sell the dry clay mix. Would the short clay cause cracking problems with small 4"x 4" terracota slabs? Thanks
  2. Cone 03 and cone 3, not the same thing... But if you actually fire cone 03, the link below has several recipes for slips that can be used on greenware and bisque. www.priscillahollingsworth.com/uploads/4/9/8/3/4983085/lowfire_glaze_list.pdf Btw, underglazes are usually dry (not glossy), is that what you are looking for? Regards
  3. Yes, zircopax can be used to make white glazes. The problem might be it giving a different kind of white, if the white stain sold where you live uses Titanium or Tin Oxide as an opacifier instead of zirconium silicate. Some people feel the Zirconium white is too bright/harsh, you can use half Zircopax, half Tin oxide and or add small amounts of Titanium Oxide or light rutile to tone it down. I think you are firing to cone 5? Not sure how much you’d need to add, because I use cone 03 terracotta clay. Some recipes call for up to 20% of zircopax. I use about 12-15% (but usually 10% is enough) when looking for a solid white and since my glazes are balanced never get pinholes. But according this old link it seems that my experience holds true at cone 5/6. http://www.potters.org/subject21453.htm Pinholes could be caused by different things (zircopax has never given me much trouble). The Recipe, how you mix it, how you bisque and what type of clay can also factor in: https://digitalfire.com/4sight/glossary/glossary_pinholing.html https://digitalfire.com/4sight/troubleshooting/ceramic_troubleshooting_glaze_pinholes_pitting.html Peeling is cause by the clay and glaze having different expansion % . https://digitalfire.com/4sight/education/understanding_thermal_expansion_in_ceramic_glazes_198.html https://digitalfire.com/4sight/troubleshooting/ceramic_troubleshooting_glaze_crazing.html https://digitalfire.com/4sight/education/adjusting_glaze_expansion_by_calculation_to_solve_shivering_199.html That website also has recipes… You could try doing a 3 part line blend. Adding Zircopax starting with 5% up to 10%, and then add 2 to 3% of frit and/or subtracting 2 to 3% kaolin at a time if you get pinholes. Probably bentonite is not needed, because the recipe you listed is very high in clay content … you could try adding 1% if needed… https://digitalfire.com/4sight/material/bentonite_106.html Good Luck!
  4. Hi, I’m ordering zirconium silicate. Through the years the names and manufacturers have changed. It’s been some years since I last placed my last order and would like some help. I used to buy plain Zircopax, the Super Pax, then Ultrox 500 and last time Zircopax Plus. Yesterday, when asked, the store told me that both Zircopax and Superpax where manufactured by Endeka and that they come in the the same bag labeled Zircopax Plus but one has a sticker that says Zircopax and the othe Super Pax. A search in the web revealed that Endeka was acquired by Ferro last year, but no news about what’s going to happen with Zircopax. Digital Fires article on Ultrox mentions a new manufacturer of Ultrox, but don’t know how long it’s been since it was last updated. Though, I’ve been able to use them all with minor adjustments. I would rather order the one that is more likely to be available for the foreseeable future… Does anyone have up to date information that would help me decide which Zirconium Silicate/supplier to use? Thanks
  5. Thanks, that's what I thought. When I get a chance l'll check for a loose connection just in case.
  6. Thanks Neil, the top and bottom elements glow and the two middle ones glow less but seem to be on as well...
  7. Not when I plug it in, but when I turn on the switch. Late last night and again just now I tried again and it worked correctly. Then again I've just kept it on for less than an hour. Don't know if unplugging the kiln when not in use makes any difference.
  8. Thanks for all the replies… No the kiln can’t be manually controlled… no l/m/h settings… The way I found to work around the single segment ramping is to programs one segment for the first 500 degrees and the enter another for the rest of the firing. Pretty easy and straight forward, like Min suggested, but the kiln doesn’t have a fast setting so you have to manually enter the number. The problem I have now is that the kiln is acting up again. When I turn it on it starts ramping the heat, not responding to the controller and making a buzzing sound that gets louder and louder until scared I throw the switch off. The turning it on while pressing the select button trick is not working any longer… Any ventures to guess what might be causing this? Anyone has any experience converting a digital kiln to a switch/sitter or exchanging the controller for a different one? Or know of any links with info on how to go about doing it?
  9. Hi, a friend of mine gave me an Evenheat kiln with a Perfect Fire digital controller. It hasn’t being used in many years. When I turned it on, the kiln started heating like it was on high and it wouldn’t respond to anything I pressed on the controller’s interface. I called Evenheat and was told by the person who answers the phone (not sure if a tech) that it was the relays. Replacing the controller, if also damaged, with a new one would cost $450+/- plus the cost of shipping the panel. When I opened the kiln the relays didn’t look burned out. I looked around the web and found this post: http://www.potters.org/subject44399.htm . The trick bellow seemed to get the controller working again. >>>Hold down the "SELECT" key, while turning the power switch on. The controller enters the programming mode, indicated by the top lamp flashing. <<<< I have a few questions and will also be thankful for any other information on how to use/repair the kiln. This controller doesn’t offer a multi segment ramping. Does anybody know how get around this limitation? I don’t need anything fancy; just want to be able to slow down the first 2 or 3 hours of the firing and then rocket fire the rest of the way. Also how do I check/ calibrate the thermocouple? I still plan on using a small cone on the shelf. Are there any other alternatives (specially cheaper ones) to sending the panel to the manufacturer? I have other kilns, so I don’t really need it. Still, it’ll be cool if I can make it work without spending much, because its 3.3cf is perfect for experimenting… Thanks,
  10. HI, some points to consider… -The bended cone you are seeing doesn’t necessarily mean the rest of the kiln reached the same temperature. I’m not sure what you mean when you say until I see my cone start to slump. You could check Orton’s website if you’d like to see a diagram of what a properly bended cone looks like. Maybe your kiln is not reaching cone 06. - Is the firing time equal in both kilns? - If the kiln you have at home is smaller or less insulated, you might need to fire a cone higher, do a soak at max temp or slow cool the kiln so the glaze gets to melt fully. Some glazes start melting way before the cone drops, others melt fast near the end of the firing, and others bubble and need time to heal. I never fire glazes to cone 06 anymore. I fire with a 04 or 03 cone in the sitter and Speedball glazes rarely give me any troubles. Speedball glazes I think use a different kind of gum and brush differently. I made test tiles big enough so I could brush the whole tile with one coat, ¾ with two coats, ½ with three coats, and ¼ with 4 coats to see the difference in terms of opacity and glossiness…
  11. Thanks Mark and TJR. I might just try the om#4 version then. It seems to be what I'm looking for. I try to order everything, all at once, several months in advance of high seasons. Thanks Niel for the recipe. Other cone 04 industry recipes are highly welcomed.
  12. Thanks to all, I'll try both... One of the reasons I'm considering om#4 is because I thought it might help solve the powdery unfired surface typical of high % frit glazes... Why would a ball clay help with raw glazing?
  13. Hi, my local store is out of epk. I rather wait until I run out of other materials before placing an order. I have a few #s of tile 6 and plenty om#4... The recipe I want to try is the one Niel posted a few days ago... cone 04-03 siglefire. I'm ok with cloudiness and will also try 10% zircopax Ferro 3124 90% EPK 10% + veegumt/bentonite Anyone knows which would be a better sub or have any advice? thanks,
  14. enbarro

    Lowfire Glaze Depression.

    Thanks, I thought the "In" in the pics was referring to Duncan Envision line. What kind of glazes are you using? I like the depth achieved. Maybe is just the white clay underneath... very cool. I started reclaiming my white clay scraps! One glaze I like a lot is Laguna's California Dreaming. It layers well but it's VERY runny, one needs to be careful with it.
  15. enbarro

    Lowfire Glaze Depression.

    English is my second language... Layering translucent glazes on a light background is an interesting concept. I'm going to give it a try... Thanks,
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