Issues with Jen's Juicy Fruit - Only problem glaze in a full load of tests????? - Electric Mid&Hi Fired Ceramics2024-03-29T06:31:34Zhttps://cone6pots.ning.com/forum/topics/issues-with-jen-s-juicy-fruit-only-problem-glaze-in-a-full-load?commentId=2103784%3AComment%3A99225&feed=yes&xn_auth=notag:cone6pots.ning.com,2014-03-24:2103784:Comment:993862014-03-24T10:29:50.905ZAyjayhttps://cone6pots.ning.com/profile/AlexanderJohnPleasance
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127169851?profile=original"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169851?profile=RESIZE_1024x1024" width="721"/></a></p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127169851?profile=original"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169851?profile=RESIZE_1024x1024" width="721"/></a></p> I quite like JJF, I've not us…tag:cone6pots.ning.com,2014-03-24:2103784:Comment:993772014-03-24T10:25:20.546ZAyjayhttps://cone6pots.ning.com/profile/AlexanderJohnPleasance
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/3127169877?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169877?profile=RESIZE_1024x1024" width="721"></img></a> I quite like JJF, I've not used it much as yet but intend to continue with it.</p>
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<p>My only problem so far has been crazing, everything I've glazed with it so far has crazed.</p>
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<p>This mug is probably the worst example and the other pot is the least crazed, it's hard to see it, but it is crazed.</p>
<p><br></br>Edit:a misunderstanding with the image posting -…</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127169877?profile=original"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169877?profile=RESIZE_1024x1024" width="721"/></a>I quite like JJF, I've not used it much as yet but intend to continue with it.</p>
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<p>My only problem so far has been crazing, everything I've glazed with it so far has crazed.</p>
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<p>This mug is probably the worst example and the other pot is the least crazed, it's hard to see it, but it is crazed.</p>
<p><br/>Edit:a misunderstanding with the image posting - but they are both there eventually - albeit in two posts. ;)</p> This version of Jen's Juicy F…tag:cone6pots.ning.com,2014-03-20:2103784:Comment:992992014-03-20T23:34:22.484ZNorm Stuarthttps://cone6pots.ning.com/profile/NormStuart
<p>This version of Jen's Juicy Fruit with Spodumene relies on less lithium carbonate which tends to fall out of suspension. Fewer decimals too.</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127169839?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169839?profile=original" width="574"/></a></p>
<p>This version of Jen's Juicy Fruit with Spodumene relies on less lithium carbonate which tends to fall out of suspension. Fewer decimals too.</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127169839?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127169839?profile=original" width="574"/></a></p> Here are some pics of pots us…tag:cone6pots.ning.com,2014-03-20:2103784:Comment:992302014-03-20T20:30:57.669ZJeff Poulterhttps://cone6pots.ning.com/profile/JeffPoulter
<p>Here are some pics of pots using JJF. The 2 are layered with other glazes, while the one with handles is mostly JJF by itself. It's not too pretty IMHO. These were done in a ^10R firing 3-4 years ago. I also think one of them has JJF with extra black iron, but I don't know which. jhp…<a href="http://storage.ning.com/topology/rest/1.0/file/get/3080313510?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3080313510?profile=RESIZE_1024x1024" width="721"></img></a></p>
<p>Here are some pics of pots using JJF. The 2 are layered with other glazes, while the one with handles is mostly JJF by itself. It's not too pretty IMHO. These were done in a ^10R firing 3-4 years ago. I also think one of them has JJF with extra black iron, but I don't know which. jhp<a href="http://storage.ning.com/topology/rest/1.0/file/get/3080313510?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/3080313510?profile=RESIZE_1024x1024" width="721" class="align-full"/></a><a href="http://storage.ning.com/topology/rest/1.0/file/get/3080337280?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/3080337280?profile=RESIZE_1024x1024" width="721" class="align-full"/></a><a href="http://storage.ning.com/topology/rest/1.0/file/get/3080321234?profile=original" target="_self"><img width="721" src="http://storage.ning.com/topology/rest/1.0/file/get/3080321234?profile=RESIZE_1024x1024" width="721" class="align-full"/></a></p> May I suggest Jen's Juicy Fru…tag:cone6pots.ning.com,2014-03-20:2103784:Comment:992942014-03-20T20:15:52.849ZNorm Stuarthttps://cone6pots.ning.com/profile/NormStuart
<p>May I suggest <strong>Jen's Juicy Fruit - Revised</strong>. </p>
<p>I've never been happy with the original, so I've made a version without soluble ingredients.</p>
<p>The Insight chemistry looks somewhat different only because Digitalfire does not use the current chemistry for Gertley Borate. I could remake my version to match the old version if you had used old gertley borate.…</p>
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<p>May I suggest <strong>Jen's Juicy Fruit - Revised</strong>. </p>
<p>I've never been happy with the original, so I've made a version without soluble ingredients.</p>
<p>The Insight chemistry looks somewhat different only because Digitalfire does not use the current chemistry for Gertley Borate. I could remake my version to match the old version if you had used old gertley borate.</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3127170052?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3127170052?profile=original" width="574"/></a></p>
<p></p> I seem to recall this same pr…tag:cone6pots.ning.com,2014-03-20:2103784:Comment:992252014-03-20T20:15:33.667ZJeff Poulterhttps://cone6pots.ning.com/profile/JeffPoulter
<p>I seem to recall this same problem when using it by itself. When layered with other glaze, it usually behaved. I had 2 different formulations. One was from Glazemixer & the other one I mixed myself. I don't know if they were identical, but they both had issues. When I do some more Stephen Hill glazing, I think I will try Norms revision & see how it behaves. When I used it in ^10R at the art center, there were less problems. jhp</p>
<p>I seem to recall this same problem when using it by itself. When layered with other glaze, it usually behaved. I had 2 different formulations. One was from Glazemixer & the other one I mixed myself. I don't know if they were identical, but they both had issues. When I do some more Stephen Hill glazing, I think I will try Norms revision & see how it behaves. When I used it in ^10R at the art center, there were less problems. jhp</p> I have a same problem drive m…tag:cone6pots.ning.com,2014-03-20:2103784:Comment:992222014-03-20T18:09:29.276Zyoo kyoung yonghttps://cone6pots.ning.com/profile/yookyoungyong
<p>I have a same problem drive me insane. a lots of place saying that temp should be high and hold a while fro soak. do you have any idea for firing schedule?</p>
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<p>I have a same problem drive me insane. a lots of place saying that temp should be high and hold a while fro soak. do you have any idea for firing schedule?</p>
<p></p> Several glazes use soda ash,…tag:cone6pots.ning.com,2012-06-30:2103784:Comment:660512012-06-30T16:30:32.141ZGeorge Lewterhttps://cone6pots.ning.com/profile/GeorgeLewter
<p>Several glazes use soda ash, and I'm not sure why.</p>
<p>The following is copied from Tony Hansen's <a href="http://digitalfire.com/4sight/material/sodium_carbonate_1263.html" target="_blank">Ceramic Materials Database</a>:</p>
<p>"Sodium Carbonate<br></br>The most common form of sodium carbonate<br></br>Formula: Na2CO3 or Na2O.CO2</p>
<p>Chemistry %<br></br>Na2O 58.70<br></br> <br></br>Volatiles %<br></br>CO2 41.30<br></br>DENS - Density (Specific Gravity) 1.44<br></br>MLPT - Melting Point (MP) 34C D<br></br>In ceramics, a…</p>
<p>Several glazes use soda ash, and I'm not sure why.</p>
<p>The following is copied from Tony Hansen's <a href="http://digitalfire.com/4sight/material/sodium_carbonate_1263.html" target="_blank">Ceramic Materials Database</a>:</p>
<p>"Sodium Carbonate<br/>The most common form of sodium carbonate<br/>Formula: Na2CO3 or Na2O.CO2</p>
<p>Chemistry %<br/>Na2O 58.70<br/> <br/>Volatiles %<br/>CO2 41.30<br/>DENS - Density (Specific Gravity) 1.44<br/>MLPT - Melting Point (MP) 34C D<br/>In ceramics, a common use of soda ash is as a soluble deflocculant in ceramic slips and glazes. It works well in combination with sodium silicate to produce slips that do not gel too quickly and whose rheology can be adjusted for changes in the hardness of the water. Higher soda ash in proportion to sodium silicate will produce a slip that gives a softer cast (stays wet longer). The total soda ash and sodium silicate amount should be tuned to create a slip that will eventually gel if left to stand. This thixotropic behavior will prevent it from settling.</p>
<p>Sodium carbonate is the preferred deflocculant for thinning glaze slurries.</p>
<p><strong>Soda ash is not normally used as a source of Na2O in glazes because it is soluble.</strong> It is used as a source of sodium in frits and glass. Its solubility makes it an ideal flux for Egyptian paste glazes."</p>
<p>I speculate that the blistering is CO2 from the soda ash that absorbed into the clay body. As the temperature goes up the soda ash breaks down into Na2O and releases CO2 gas that builds up and tries to escape to the atmosphere, creating bubbles if trapped in the liquid phase glaze. Perhaps the blistering is an unwanted side effect of trying make to the glaze slurry easier to store or to apply?</p>
<p>It would be interesting to create an equivalent glaze sourcing Na2O from non water soluble material. </p> John Post has very interestin…tag:cone6pots.ning.com,2012-06-30:2103784:Comment:659792012-06-30T15:21:21.161ZNadine Mercaderhttps://cone6pots.ning.com/profile/NadineMercader
<p>John Post has very interesting remarks about firing Jen's...</p>
<p>Also one may question the accuracy of the pyrometer reading. I have used 2 in one firing as insurance.</p>
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<p>John Post has very interesting remarks about firing Jen's...</p>
<p>Also one may question the accuracy of the pyrometer reading. I have used 2 in one firing as insurance.</p>
<p></p> Hi Jen, Thanks for your comme…tag:cone6pots.ning.com,2012-06-14:2103784:Comment:649192012-06-14T07:05:41.689ZJan Wallacehttps://cone6pots.ning.com/profile/JanWallace
<p>Hi Jen, Thanks for your comments. I agree with what you have said and I think that for my results above, my glaze application was a little too thick. I have come to this conclusion as the glaze only blistered in the deeper lines on the tile where the glaze was thicker as the thinner area came out fine where. Perhaps your glaze results are a result of application of glaze and thickness too? The trials and tribulations of glazing. Sometimes very frustrating and other times a joy.</p>
<p>Hi Jen, Thanks for your comments. I agree with what you have said and I think that for my results above, my glaze application was a little too thick. I have come to this conclusion as the glaze only blistered in the deeper lines on the tile where the glaze was thicker as the thinner area came out fine where. Perhaps your glaze results are a result of application of glaze and thickness too? The trials and tribulations of glazing. Sometimes very frustrating and other times a joy.</p>