All Discussions Tagged 'testing' - Electric Mid&Hi Fired Ceramics2024-03-29T01:06:22Zhttps://cone6pots.ning.com/forum/topic/listForTag?tag=testing&feed=yes&xn_auth=noHelp Us Organize C6P Glaze Education Days - - - January 15 - February 28, 2015tag:cone6pots.ning.com,2014-11-20:2103784:Topic:1163932014-11-20T19:15:13.172ZGeorge Lewterhttps://cone6pots.ning.com/profile/GeorgeLewter
<p>Please volunteer to present an article designed to help our ceramic artists navigate the sometimes treacherous waters of glaze development. (PLEASE DO NOT PUBLISH YOUR ARTICLE UNTIL THE START OF THE EVENT ON JANUARY 15, 2015, but by all means go ahead and promote it.<span style="font-size: 12.8000001907349px;">)</span></p>
<p>A few topics that could be very helpful to members:</p>
<ul>
<li><span style="font-size: 13px;">basic glaze chemistry - weight percentages, unity, and molar formulas…</span></li>
</ul>
<p>Please volunteer to present an article designed to help our ceramic artists navigate the sometimes treacherous waters of glaze development. (PLEASE DO NOT PUBLISH YOUR ARTICLE UNTIL THE START OF THE EVENT ON JANUARY 15, 2015, but by all means go ahead and promote it.<span style="font-size: 12.8000001907349px;">)</span></p>
<p>A few topics that could be very helpful to members:</p>
<ul>
<li><span style="font-size: 13px;">basic glaze chemistry - weight percentages, unity, and molar formulas and how each is or is not useful.</span></li>
<li><span style="font-size: 13px;">What are limit formulas</span></li>
<li><span style="font-size: 13px;">glaze room safety</span></li>
<li><span style="font-size: 13px;">clear strategies for substituting raw materials</span></li>
<li><span style="font-size: 13px;">methodology for creating a glaze that is economical and free of defects</span></li>
<li><span style="font-size: 13px;">step-by-step testing methods and when to use which (fast five, line blends, triaxle, and currie grids)</span></li>
<li><span style="font-size: 13px;">getting comfortable with Insight-Live glaze recipe database</span></li>
<li><span style="font-size: 13px;">firing schedules</span></li>
<li><span style="font-size: 13px;">glaze combinations that work together</span></li>
</ul>
<p>What topics are you interested in, where online information is scant or very hard to find? <span style="text-decoration: underline;">Providing well described links to good, existing information is as useful, and far easier than starting from scratch</span>.</p>
<p>Half a dozen committed facilitators could turn this event into the liveliest interaction yet on the cone6pots network. If the interest is sufficient, we can utilize web meeting technology for live sessions (Skype for small groups and webx for larger groups. </p> Small test kilntag:cone6pots.ning.com,2012-05-22:2103784:Topic:635842012-05-22T21:18:16.602ZJohn Talbothttps://cone6pots.ning.com/profile/JohnTalbot
<p>I found a small 115V kiln on my Craigslist and I think it would make a great test kiln. I'm limited in space right now but I would like to create my own glazes and I've been thinking of buying it to at least be able to run test tiles through. What do y'all think? I'm sure some of you have experience in this type of thing. Any advice would be greatly apreciated.</p>
<p></p>
<p>-John</p>
<p></p>
<p><img src="http://images.craigslist.org/5E85H35J43Ee3M13Hec5hb274f0e1ac2215c6.jpg"/></p>
<p>I found a small 115V kiln on my Craigslist and I think it would make a great test kiln. I'm limited in space right now but I would like to create my own glazes and I've been thinking of buying it to at least be able to run test tiles through. What do y'all think? I'm sure some of you have experience in this type of thing. Any advice would be greatly apreciated.</p>
<p></p>
<p>-John</p>
<p></p>
<p><img src="http://images.craigslist.org/5E85H35J43Ee3M13Hec5hb274f0e1ac2215c6.jpg"/></p> Online Glaze Recipe Database Project is Now Under Waytag:cone6pots.ning.com,2011-12-10:2103784:Topic:496052011-12-10T05:28:36.478ZGeorge Lewterhttps://cone6pots.ning.com/profile/GeorgeLewter
<p>Tony Hansen, owner of the Digitalfire Corporation contacted me after my announcement went out that we were about to develop an online glaze database. He is on the verge of releasing a much more robust online glaze database than anything we were contemplating. We have been in discussions and are starting to work out details of how the interested members of the cone6pots network can participate in testing and using Insight Live for cataloging, finding, testing, and documenting glaze recipes.…</p>
<p>Tony Hansen, owner of the Digitalfire Corporation contacted me after my announcement went out that we were about to develop an online glaze database. He is on the verge of releasing a much more robust online glaze database than anything we were contemplating. We have been in discussions and are starting to work out details of how the interested members of the cone6pots network can participate in testing and using Insight Live for cataloging, finding, testing, and documenting glaze recipes. Insight Live will allow us to post recipes singly or in batches from the existing glaze software such as Matrix, Glazemaster, Hyperglaze, Glazechem, or Insight, as well as singly from emails or entered manually. We should be able to add pictures and notes to existing recipes, showing how our results differ from previous ones with different firing, clay bodies, batches of raw materials, etc. -- Thus a glaze record could display a variety of results rather than one or two.</p>
<p>There will be no charge initially, but after the testing phase ends, we will need to purchase a site license. Based on initial talks, the license should not necessitate an annual fee for our members greater than the $5-10 that we have already mentioned in the glaze database discussion forum. One of the really interesting possibilities for us as a group, is setting up project glazes where we collaborate in a very organized way to develop new glazes or improve existing ones.</p>
<p>We have a golden opportunity to get in on the ground floor of what is likely to be the most useful and valuable glaze database on earth. I urge each and every one of you who mix your own glazes to become part of this massive undertaking which will open up to colleges, universities, businesses, and ceramic artists world-wide. </p>
<p>Tony is finishing up a couple introductory videos and we can expect to see his Web application come up on a restricted basis for us very soon.</p>
<p>I ran a survey to asses interest in this and related educational opportunities. It was answered by 209 members and provides much information for us as we ponder the way forward for the cone6pots network. <a href="http://cone6pots.ning.com/page/glaze-database" target="_self"><u>View the survey results</u></a></p>
<p>Thank you,</p>
<p>George Lewter</p> Testing Glazes for Durability, Fit, and Toxicity on Functional Waretag:cone6pots.ning.com,2009-12-11:2103784:Topic:40542009-12-11T15:17:15.000ZLiz Gamelinhttps://cone6pots.ning.com/profile/LizGamelin
<p>Testing glaze toxicity, fit, and durability can be a two tiered process.</p>
<p>You can run a number of tests at home with very limited equipment to pre-screen potential production glazes. While your results won't give you total certainty that a particular glaze or combination is safe, you <span style="text-decoration: underline;">can eliminate some of the more problematic glaze formulations</span>, and save the cost of lab testing.</p>
<p>Some suggested tests.…</p>
<p>Testing glaze toxicity, fit, and durability can be a two tiered process.</p>
<p>You can run a number of tests at home with very limited equipment to pre-screen potential production glazes. While your results won't give you total certainty that a particular glaze or combination is safe, you <span style="text-decoration: underline;">can eliminate some of the more problematic glaze formulations</span>, and save the cost of lab testing.</p>
<p>Some suggested tests.</p>
<ul>
<li><a href="http://digitalfire.com/4sight/tests/ceramic_test_glaze_leaching_test.html" target="_blank">http://digitalfire.com/4sight/tests/ceramic_test_glaze_leaching_test.html</a></li>
<li><a href="http://digitalfire.com/4sight/tests/ceramic_test_300fice_water_glaze_crazing_test.html" target="_blank">http://digitalfire.com/4sight/tests/ceramic_test_300fice_water_glaze_crazing_test.html</a></li>
<li><a href="http://digitalfire.com/4sight/tests/ceramic_test_glaze_hardness.html" target="_blank">http://digitalfire.com/4sight/tests/ceramic_test_glaze_hardness.html</a></li>
</ul>
<p></p>
<p>If your home testing indicates that a glaze (or combination) containing toxic metals is stable and durable, and you know you want to use it in the food and mouth contact areas of functional pottery, then it is only logical to have it leach tested by a certified lab. Taking that step will enable you peace of mind when you think about the people who use your ware.</p>
<ul>
<li>Tony Hansen's list of 15 testing labs. <a href="http://digitalfire.com/services/database.php?list=labs" target="_blank">http://digitalfire.com/services/database.php?list=labs</a></li>
</ul>
<p>Other possible areas of concern</p>
<ul>
<li>Glaze crazing, and clay body porosity combining to harbor pathogens that could multiply when food is stored in a pot.<br/> <a href="http://digitalfire.com/4sight/education/crazing_and_bacteria_is_there_a_hazard_271.html" target="_blank">http://digitalfire.com/4sight/education/crazing_and_bacteria_is_there_a_hazard_271.html</a></li>
</ul>
<ul>
<li>Shivered glaze chips being ingested with possible sharp edges as well as toxic release in stomach acid.</li>
</ul>
<p>It is no coincidence that so many questions are answered at digitalfire.com. Tony has amassed the web's most complete source of ceramic information. Many thanks, Tony.</p>
<p>Note: Liz's discussion was edited and expanded here to bring more information to the base topic, and encourage a wider response. G Lewter 3/12/2015</p>