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Lab talk, the good, the bad, and the ugly
Porcelain
Noritake EX3 firing parameters
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<blockquote data-quote="RDA" data-source="post: 129330" data-attributes="member: 6261"><p>First start with your opaque. If you are using the paste opaque, do not mix in the covering oil/liquid. Tilt the jar and use the opaque that is not covered with this liquid, it is only there to maintain the moisture until the opaque is used up. </p><p>My temps are in fahrenheit:</p><p>Opaque:start 931F, 8 min. dry(ramp up),heat rate 117F, drop vac @1795F, 1796F hi, 1 min hold.</p><p>Bake 1: 1111F, 8 min. dry, rate 81F, drop vac. @1665, 1670F hi, no hold.</p><p>Bake 2: 1111F, 5 min. dry, rate 81F, drop vac. @1660, 1665F hi, no hold.</p><p>Natural Glaze: 1111F, 4 min. dry, rate 81F, no vac. unless adding on, 1645F hi.</p><p>I've been using EX3 for years, and these temps/times work for me. Porcelain furnaces will vary in temps, so adjust your temps and times slowly( 5 degrees +/- at a time).</p><p>A friend had a similar problem and it came down to the opaque covering liquid. He was mixing it into the paste, Noritake's instructions say otherwise.</p></blockquote><p></p>
[QUOTE="RDA, post: 129330, member: 6261"] First start with your opaque. If you are using the paste opaque, do not mix in the covering oil/liquid. Tilt the jar and use the opaque that is not covered with this liquid, it is only there to maintain the moisture until the opaque is used up. My temps are in fahrenheit: Opaque:start 931F, 8 min. dry(ramp up),heat rate 117F, drop vac @1795F, 1796F hi, 1 min hold. Bake 1: 1111F, 8 min. dry, rate 81F, drop vac. @1665, 1670F hi, no hold. Bake 2: 1111F, 5 min. dry, rate 81F, drop vac. @1660, 1665F hi, no hold. Natural Glaze: 1111F, 4 min. dry, rate 81F, no vac. unless adding on, 1645F hi. I've been using EX3 for years, and these temps/times work for me. Porcelain furnaces will vary in temps, so adjust your temps and times slowly( 5 degrees +/- at a time). A friend had a similar problem and it came down to the opaque covering liquid. He was mixing it into the paste, Noritake's instructions say otherwise. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Porcelain
Noritake EX3 firing parameters
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