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Ginny C

Member Since 02 Apr 2010
Offline Last Active Mar 22 2017 01:40 PM

Posts I've Made

In Topic: Blisters Worse After Re-Firing

16 October 2016 - 02:39 PM

I used the term agate clay because I thought that referred to colored clays inlaid into a slab...Maybe that's not the right term.

 I colored some of my white B-Mix clay with iron oxide powder my son sent to me from France. Using different amounts in slip that I dried on plaster and wedged up I ended up with different shades. Layered slices of the colored clays with plain B-Mix, and then twisted a slice and rolled it out flat and thin.  Rolled it into a slab of brown speckled Laguna clay.


But the blisters on this piece are on both that strip plus even more on the other part of the dish. 


I think my idea of re-bisquing the other 2 pieces made the same way but not yet glaze fired is what I'm going to do.

In Topic: Blisters Worse After Re-Firing

14 October 2016 - 11:46 AM

Thanks, all! I do think the hammer is called for now, especially since I cut my finger on a big one on the inside as I was moving it for the photo.


But it is the same Laguna B-Mix clay I've used for years, and other pieces from that batch of clay have  been fine.


I made several items from a different clay (a brown Laguna with speckles) which were bisqued in the same load as the green vase, in a shared studio in MI.  These pieces I brought home to glaze and fire, and one of them blistered and two mugs I've fired so far did not blister at all.  I have two more pieces, one quite large, from the same brown clay bisqued in MI and now waiting to be glaze fired in a friend's larger kiln, and I'm wondering whether I should re-bisque them first!  ?  If the problem is that that load was not bisqued long enough, would it be wise to re-bisque them?


(These pieces are unique, with inlaid agate clay that I'd hate to mess up! It's a clear glaze. This doesn't show the blisters, but there are a few there.


Attached File  blistered brown clay %22bacon%22 dish.png   289.22KB   3 downloads

In Topic: Hollow Die Extruder. Clay Not "healing"

22 September 2016 - 01:50 PM

I should add that it works perfectly now that I understand it!  And a shout out Tyler Allanson at T.A. Metal for his helpfulness!  His was the only place I found that sells the hollow dies individually so you can order just the shapes you want. Much more cost efficient than the sets most ceramic places sell.

In Topic: Hollow Die Extruder. Clay Not "healing"

03 September 2016 - 02:54 PM

Problem solved.  Just had to move up the bar rather than screwing it all the way down to the die!


In Topic: Hollow Die Extruder. Clay Not "healing"

03 September 2016 - 01:15 PM

I'm not there right now.  The dies are from TA Metal in Canada.

I think, from reading earlier posts on extruders, that the bar across is too close to the die. At least the way we installed it.  Will go back now and see if it can be moved up. Also might file the top edge of the opening to make it slightly beveled.


More later!