[Clayart] Large tile question

Ken Chase kchase235 at gmail.com
Thu Jan 19 18:59:50 EST 2017


Thanks Paul:
Think I'll need to go with smaller tiles. My kiln
Is too small for that large a tile unless it stands.
That would likely distort.
Much appreciate the great suggestion.
Best,
Ken

Sent from my iPad

> On Jan 19, 2017, at 10:56 AM, Paul Lewing <pjlewing at comcast.net> wrote:
> 
> 
> On Jan 19, 2017, at 9:28 AM, Ken Chase <kchase235 at gmail.com> wrote:
> 
> I want to make a tile 11X17" to top a wood table.
> I'm using Cone 5 Bmix. Is it possible to calculate
> How much it will shrink and provide an exact fit?
> Or, should I expect to have to make the tile larger and use new wood to make the right fit?
> 
> Most people will tell you how to mathematically calculate the shrinkage of your clay body and figure it that way.  There’s an easier way, that you should do with any clay body you’re making tile from.  Just make a ruler.  Make a strip of clay and mark off a ruler on it,  You don’t need to mark off every increment, just every 1/4” will do fine.  Now fire that to the temperature you’ll be firing to.  Now when you need to make a tile to fit a certain size, you lay a ruler next to your fired ruler and just read the required size off the ruler.  So, for instance, if your clay shrinks about 12%, and you need to make a tile 8” wide, next to 8” on the real ruler it will read about 9” on the fired ruler.  Simple.  No math.
> 
> Your much bigger problem is going to warping.  Cracking might also be a challenge on a tile that big.  One solution might be to use peperclay to do this.  One of the times I was at Appalachian Center for Crafts, Rosette Gault was doing a paperclip workshop in the other studio and they were making tiles about 18” square.  They had made plaster slabs with raised edges and were pouring paperclip slip into them.  It was amazing.  They could even lift them out of the molds, bending them almost double and they still fired flat.
> Paul Lewing
> www.paullewingtile.com <http://www.paullewingtile.com/>
> www.paullewingart.com <http://www.paullewingart.com/>
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