westella Posted December 27, 2016 Report Share Posted December 27, 2016 Hi guy's i've been throwing a few pots and for a while now but never until now played with porcelain so over the christmas period i've got hold of some slip moulds so i've poured a few christmas decorations now some are small but solid and the others are small but thin walled so has anyone on here got any good advise on a basic firing schedule i could start off with please terry Link to comment Share on other sites More sharing options...
Mark C. Posted December 27, 2016 Report Share Posted December 27, 2016 Would need more info on what cone the clay is fired to. All pots unless very thick can take the same firing schedule.Slip wares are few even walled so they are extremely durable with faster schedules-but thick solid work must be slowed down. Link to comment Share on other sites More sharing options...
westella Posted December 28, 2016 Author Report Share Posted December 28, 2016 The casting slip is scarva np0032 snow white porcelain casting slip no more info on the container not done porcelain casting before so a bit lost my kiln is ready to go but not sure how to fire porcelain looked on the net but confused by all the different cone schedule just need a firering and glazing basic schedule that i understand my kiln is pre programmed for earthenware, glazing, and stoneware, by the installers got 13 programable space's each with 9 segments. Any help appreciated, thank you. Link to comment Share on other sites More sharing options...
PeterH Posted December 28, 2016 Report Share Posted December 28, 2016 Strange, the Scarva site doesn't seem to give any firing cone or temperature. http://www.scarva.com/en/Scarva-Nano-Colours-NPO032-Snow-White-Porcelain-Casting-Slip/m-5490.aspx Does it say anything on the container? If not, I'd try emailing Scarva (as they suggest under the "Description" tag of the referenced page). Link to comment Share on other sites More sharing options...
glazenerd Posted December 28, 2016 Report Share Posted December 28, 2016 The fact that it is white porcelain, tells me a few things. They would have to use grolleg (highly unlikely) or Snobrite (most probable) kaolin, with a lower plasticity ball clay to get the color. Pending the flux additions: but my instinct says it is a cone 6 body. You can make a cone 10 slip, but very rare to find one premixed. I am not aware of any low fire porcelain clay or slip bodies. So follow a cone 6 schedule. Nerd Link to comment Share on other sites More sharing options...
Sputty Posted December 28, 2016 Report Share Posted December 28, 2016 . Link to comment Share on other sites More sharing options...
oldlady Posted December 28, 2016 Report Share Posted December 28, 2016 i know you are not in the USA but i do know that here the makers of porcelain doll heads use slip molds and the work is fired to cone 06, about 1800 degrees fahrenheit. which translates to ?? Celsius. sorry, no reference book cone charts here. yes, nerd, the name is not correct but it is the common usage. Link to comment Share on other sites More sharing options...
Mark C. Posted December 28, 2016 Report Share Posted December 28, 2016 My guess is it a low fire slip-cone 06-08 Just for Nerd I had cone 10 slip made dry mixed for many years. Laguna Clay does offer it as a stock item- but they made a custom mix for me with more alumina so it did not warn as much at cone 10.It was MC porcelain which by the way was just a coincidence as it was a great slip with some more additions like more EPK for the alumina content Link to comment Share on other sites More sharing options...
westella Posted December 28, 2016 Author Report Share Posted December 28, 2016 i'll try and email scarva and ask about it i was just going to upload a picture of what the label say's but i can't see how on here lol. potterycrafts when i asked them they sent me a cone tempeture chart which does show porcelain on a cone06 would the ramp up be any different than stoneware Link to comment Share on other sites More sharing options...
Mark C. Posted December 28, 2016 Report Share Posted December 28, 2016 (would the ramp up be any different than stoneware) NO Link to comment Share on other sites More sharing options...
neilestrick Posted December 28, 2016 Report Share Posted December 28, 2016 I wouldn't do anything until you've confirmed the firing temp. Commercial products are often labeled differently than we potters would do it. For example, many of the commercial cone 6 glazes out there and they say 'high-fire'. They may call it a porcelain even though it's low fire. You can't assume anything. Confirm before firing. Link to comment Share on other sites More sharing options...
glazenerd Posted December 28, 2016 Report Share Posted December 28, 2016 From what I have seen in the forums about UK/European clay markets: a broad range of cone firing is common. I have seen several posts in just the last month with firing range of 06 to 6. Which is impossible by the way: 06 requires 40% (plus) flux additions at minimum, and 6 requires 25% +/-. Nerd Link to comment Share on other sites More sharing options...
westella Posted December 29, 2016 Author Report Share Posted December 29, 2016 Not much info but the top tempeture is 1220 - 1240c but he didn't know about soak times phone back after the christmas break terry Link to comment Share on other sites More sharing options...
westella Posted December 29, 2016 Author Report Share Posted December 29, 2016 i know you are not in the USA but i do know that here the makers of porcelain doll heads use slip molds and the work is fired to cone 06, about 1800 degrees fahrenheit. which translates to ?? Celsius. sorry, no reference book cone charts here. yes, nerd, the name is not correct but it is the common usage. about 980 Celsius not much info from scarva think their all on a christmas break but found out top tempeture is cone 6 1220 -1240 Link to comment Share on other sites More sharing options...
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