What causes glazes to react with each other - Electric Mid&Hi Fired Ceramics2024-03-29T11:33:07Zhttps://cone6pots.ning.com/forum/topics/what-causes-glazes-to-react-with-each-other?groupUrl=cone6glazetestingreporting&commentId=2103784%3AComment%3A141994&xg_source=activity&groupId=2103784%3AGroup%3A6412&feed=yes&xn_auth=nosounds like, experiment and t…tag:cone6pots.ning.com,2017-05-18:2103784:Comment:1417082017-05-18T16:22:41.864ZBrent Farlerhttps://cone6pots.ning.com/profile/BrentFarler
<p><br></br>sounds like, experiment and test, experiment and test, experiment and test, repeat.</p>
<p>I am guessing the amount of soak at the target cone can have an effect as well. so fluidity + time at temperature</p>
<p><br></br> <cite>George Lewter said:</cite></p>
<blockquote cite="http://cone6pots.ning.com/forum/topics/what-causes-glazes-to-react-with-each-other?groupUrl=cone6glazetestingreporting&#2103784Comment141882"><div><div class="xg_user_generated"><p>Glazes layered or in contact…</p>
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<p><br/>sounds like, experiment and test, experiment and test, experiment and test, repeat.</p>
<p>I am guessing the amount of soak at the target cone can have an effect as well. so fluidity + time at temperature</p>
<p><br/> <cite>George Lewter said:</cite></p>
<blockquote cite="http://cone6pots.ning.com/forum/topics/what-causes-glazes-to-react-with-each-other?groupUrl=cone6glazetestingreporting&#2103784Comment141882"><div><div class="xg_user_generated"><p>Glazes layered or in contact with each other can exhibit wild behavior due to eutectic melting. Material components that have higher melting points by themselves can have drastically reduced melting points when mixed together, or in contact with each other. Quite often two very stable glazes, individually, will run off a pot when layered together.</p>
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</blockquote> Glazes layered or in contact…tag:cone6pots.ning.com,2017-05-18:2103784:Comment:1418822017-05-18T14:37:54.687ZGeorge Lewterhttps://cone6pots.ning.com/profile/GeorgeLewter
<p>Glazes layered or in contact with each other can exhibit wild behavior due to eutectic melting. Material components that have higher melting points by themselves can have drastically reduced melting points when mixed together, or in contact with each other. Quite often two very stable glazes, individually, will run off a pot when layered together.</p>
<p>Glazes layered or in contact with each other can exhibit wild behavior due to eutectic melting. Material components that have higher melting points by themselves can have drastically reduced melting points when mixed together, or in contact with each other. Quite often two very stable glazes, individually, will run off a pot when layered together.</p> rather than the flow/run what…tag:cone6pots.ning.com,2017-05-18:2103784:Comment:1417902017-05-18T14:37:25.378ZBrent Farlerhttps://cone6pots.ning.com/profile/BrentFarler
<p>rather than the flow/run what about the mixing of two glazes. Would this imply if both are high in calcium, magnesium or strontium they won't mix and if high in sodium, potassium or lithium they would 'mix' i.e. tend towards more mixing of the colorants.</p>
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<p>Another way to look at it is what makes one pair of glazes 'coat' one another versus what makes another pair of glazes mix and react with each other?</p>
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<p>rather than the flow/run what about the mixing of two glazes. Would this imply if both are high in calcium, magnesium or strontium they won't mix and if high in sodium, potassium or lithium they would 'mix' i.e. tend towards more mixing of the colorants.</p>
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<p>Another way to look at it is what makes one pair of glazes 'coat' one another versus what makes another pair of glazes mix and react with each other?</p>
<p> </p> Brent:
Flux basics- calcium,…tag:cone6pots.ning.com,2017-05-18:2103784:Comment:1419942017-05-18T03:44:42.396ZTom Andersonhttps://cone6pots.ning.com/profile/TomAnderson
<p>Brent:</p>
<p>Flux basics- calcium, magnesium and strontium are considered low flow fluxes: meaning they have a tendency not to run. Sodium, potassium, and lithium are high flow: meaning they have a tendency to run.</p>
<p>The base glaze should be high in calcium, magnesium and strontium; so it will be stable. The top layer should be sodium, potassium, or lithium so that it will run.</p>
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<p>Want more run- increase the lithium.</p>
<p>Want even more run: add some frit- the molten lava…</p>
<p>Brent:</p>
<p>Flux basics- calcium, magnesium and strontium are considered low flow fluxes: meaning they have a tendency not to run. Sodium, potassium, and lithium are high flow: meaning they have a tendency to run.</p>
<p>The base glaze should be high in calcium, magnesium and strontium; so it will be stable. The top layer should be sodium, potassium, or lithium so that it will run.</p>
<p></p>
<p>Want more run- increase the lithium.</p>
<p>Want even more run: add some frit- the molten lava river.</p>
<p>Want to freeze the glaze in place? add lower percentages of alumina hydrate.</p>
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<p>Some basic principles, without paragraphs of chemistry.</p>
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<p>Tom</p>