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Member Since 04 Apr 2012
Offline Last Active Apr 11 2014 10:22 AM

Topics I've Started

Coefficient Of Exxpansion

30 December 2013 - 06:06 PM

I have just opened a new (for me) bag of clay, Laguna B3 Brown.  A little late in the day I decided to check the clay's characteristics and found that it has what seems to be a high COE - 7.25 x 10-6.  Is this likely to create any problems when glazing?  Mostly in the past I have used   the Laguna cone 5 B mix and B mix with grog.  Thanks for being there.  Joan.

Yellow Ochre

07 September 2013 - 11:06 AM

Is there a difference between yellow ochre and yellow iron oxide?  I want to make up a test batch of Hannah's Fake Ash glaze but it calls for yellow ochre which I don't have in my pantry and which Laguna does not have in its online catalogue.  They do have yellow iron oxide listed however.


Thanks, Joan Klotz (Venicemud)

Clay Shrinkage

07 May 2013 - 12:45 PM

I was just throwing a few mugs with rather specific final dimensions in mind and realized that what I thought to be true may not be. Is clay shrinkage uniform in all directions? For example, if I have a freshly thrown cylinder which stands 6" tall and has a diameter of 4" will the final dimensions be 5.28 by 3.52" after the glaze firing?