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Ginny C

Member Since 02 Apr 2010
Offline Last Active Aug 19 2016 04:52 PM

Topics I've Started

Additives For Old Glazes

16 August 2016 - 10:35 AM

I'm spending time this month at a community pottery room and the glazes are mostly a mess.  No one is in charge of them. The good  potters mostly bring their own, and the beginners just struggle to brush on from the buckets of various glazes.  They have been mixed from dry but have sat for several years. I know to scrape up the settled part, sieve the whole thing, and add some epsom salt solution to cut down on the settling.


However, most people want to brush the glazes, and they dry instantly on the pots, making a mess. I have read about using gum solution and will order some, I think, but in a pinch, can I just add some glycerin?  And how about some vinegar, also??  Do I have to learn how to measure specific gravity??


There are lots of bags of dry glazes in the cupboard.  All of them are Laguna MS for Cone 5-6. They would like me to mix them up.  There is Bentonite, so I will use that (although the colors of these glazes are not what I would choose!!).   But to make them suitable for brushing, should I add gum along with the bentonite?  I've read that the gum in powder form must be mixed with water and used as all or part of the water when mixing the glaze.  (There are lots of other glaze ingredients stored there, so in the past someone knew how to use them!)


Ideally, I would think I should mix the glazes into two containers, one for brushing and one for dipping, with different additives. AND LABEL THEM AS SUCH!


Can you wonderful people send me some suggestions and maybe some links to clearly explained instructions? 



Glazing Mugs With A Different Glaze On The Handle

18 June 2016 - 05:01 PM

How does Mike Jabbur glaze his beautiful mugs? I can't figure it out! The gorgeous handles are already attached, of course, but the glaze on the body of the mug is different from that on the handle and inside. Anyone know??

Will Mike Jabbur share his technique?


Ginny Clark

Large Platter Broke In Half In Bisque Firing. Anything To Do With It?

29 April 2016 - 08:18 PM

Lots of work went into this large (15" diameter) agate ware platter, but it broke clean in half during the bisque firing! I had it sitting on sheets of Bullseye kiln liner paper to allow it to slide on the kiln shelf. 


I'm sure it is now headed for the driveway, unless someone can suggest another use, or even a way to repair it. (Ha!)




Just to show what it would look like with a clear glaze, here's another piece I made earlier:



FYI, the patterned clay strips are placed on a thin slab of the same clay (Laguna B-Mix for cone 5) and rolled hard until they are basically one unit. Then this platter was cut to shape and placed on a canvas sling to form the gentle curve while drying to leather hard.  I placed a ware board under it (under the sling) at the right distance to give it a flat bottom.  In case someone thinks it wasn't dry...no chance! I'm sure it was thoroughly dry.   The process seemed to work, until...I opened the kiln!



Simple Wadding For Supporting Pots In Electric Kiln Glaze Firing

05 April 2016 - 02:51 PM

I have some very narrow little vases I'm going to glue to a separate base, also glazed, AFTER they are all glaze fired. I'd like to glaze them all the way down, so I will need to support them during the glaze firing, and I don't have small enough supports. Can i make wadding with just my regular B-Mix (cone 5) clay with maybe some sand wedged in?


I plan to glue the wads in place before placing each vase in the kiln. I don't have any of the usual suggested ingredients around, but I do have some sand!


Suggestions? thanks!

Slip On Greenware

17 December 2015 - 04:38 PM

I keep seeing photos of potters dipping a finished pot, greenware stage, into a bucket of slip.  I'm wondering what the various reasons for doing this are.  Obviously, a white slip over brown or red clay allows a nice result when incising a pattern or design. And of course designs can be put into the slip while it's still wet, with a finger.  But are there other reasons to use an overall slip? 


Just curious!