Zero3 Porcelain - Experimental

Code: L3924C
Modification Date: 2018-03-20 14:05:55

MaterialAmountUnits
New Zealand Kaolin227.0Kilograms
Ferro Frit 3110300.0Pounds
Silica200.0Pounds
VeeGum T30.0Pounds
Mason 6336 Blue Stain250.0Grams

Alert: This recipe contains units of measure, it cannot be imported into Desktop Insight as is.
You must recalcuate it to percentages and then to the total you need (if it has not be done here).

Notes

This body is not available for sale. Yet. I am beta-testing it. I have done a long series of test mixes in search of a blend of North American materials that will produce a fritted white low-fire oxidation porcelain. But I was not able to do so. The difficulty is that the glassy phase of the frit amplifies the color of any iron available in the body (even tiny amounts) to produce a bone or ivory white.

The only solution was a switch to New Zealand Kaolin (which contains only 0.15% iron) and VeeGum. The result is dramatically better. However a pinkish color still remained. This made it necessary to add a small amount of blue stain. Now it has the color of cone 10 reduction porcelain! Be careful about substituting that stain. We have found this one flows freely. If the stain you substitute agglomerates during mixing you will get ugly blue specks in your porcelain!

This body pairs with G2931K clear glaze (the fully fritted version of G2931F) and a drop-and-soak firing glaze schedule. Look for a links to that here or google it.

The secrets of this body are thus:
-The 30% frit: Frit is expensive (no normal porcelains contain it because of this). But it makes the impossible possible!
-The NZ Kaolin: The whitest available in the world.
-The VeeGum: Super plastic super-white. Bentone also works.
-The silica for glaze fit and as a structural framework.

As noted, this body will be among the most plastic you have even used (of any kind). But this is only true if it is stiff enough. If you try to use it soft the shrinkage will be much higher and you risk drying cracks.

One caveat: This is not an attempt to rival the fired surface of cone 6 Plainsman Polar Ice, it is not as smooth and dense (but it is almost zero porosity). You could, of course, fire higher to produce higher density. But remember, this is frit-ware, warping issues will creep in quickly as temperature is increased. Firing higher than cone 03 will not necessarily produce more strength either. It will produce more fired shrinkage (which is already quite high).

If we were to manufacture this is could cost $100 a box. But before dismissing this think about the advantages of using it for making smaller pieces:
-Fast firing: two or three times a day (as little as 3 hours start to kiln opening).
-The appearance of cone 10R but with far brighter colors.
-High strength (rivaling any other temperature).
-Throw ware ultra thin and light.
-A perfectly fitted ultra-clear glaze that is far cheaper to make than commercial glazes (and works better).
-Dramatic reduction in wear-and-tear on kiln elements and energy usage.
-Remember to factor in the fact that you will be able to charge more for pieces when you calculate clay-cost-per-piece.

A final note: Because this body matures at such a low temperature it needs to be bisqued much lower. You will need to experiment. Consider starting at around 1500F. If ware is not absorbent enough fire lower.

Units-of-measure: I have specified 50 lb bags to fill the needed amount for the NZ kaolin, however it comes in 20kg bags. But you are likely mixing in grams or ounces so just refer to the percentage column.

One more thing. Consider getting an account at insight-live.com, copy and paste the recipes and document all your testing well. And you will get monthly email updates on this another projects.

Out Bound Links

In Bound Links

XML to Paste Into Insight

<?xml version="1.0"?>
<recipes version="1.0" encoding="UTF-8">
<recipe name="Zero3 Porcelain Experimental" id="133" date="2019-04-18" codenum="L3924C">
<recipelines>
<recipeline material="New Zealand Kaolin" amount="227.000" unitabbr="KG" added="0"/>
<recipeline material="Ferro Frit 3110" amount="300.000" unitabbr="LB" added="0"/>
<recipeline material="Silica" amount="200.000" unitabbr="LB" added="0"/>
<recipeline material="VeeGum T" amount="30.000" unitabbr="LB" added="0"/>
<recipeline material="Mason 6336 Blue Stain" amount="250.000" unitabbr="GM" added="0"/>
<url url="https://digitalfire.com/4sight/recipes/zero3_porcelain_experimental_133.html" descrip="Recipe page at digitalfire.com"/>
</recipelines>
<urls/>
</recipe>
</recipes>


By Tony Hansen




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