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glaze crawling

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#1 Juli Long

Juli Long

    La Paloma Texas Pottery

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Posted 11 February 2012 - 05:58 PM

First I want to apologize to moderator for previous topic thinking this was shivering when I think its glaze
crawling. I was given a detailed explanation on shivering and I thank all who responded to my topic
but I think I should have said crawling glaze.
So I reposted with a photo to be sure.
Mixed new batch of glaze.
25 lb. dry commercial
bisqued to 04
cleaned all pieces with water and rag
yes this glaze has crawled before
previous glazing it did not with thinner glaze mix.
This glaze was a little thick so I dipped quick, in and out . mixed this batch for 7 minutes with jiffy mixer. Used 24 pints of water to make up a little over 3 gallons.
In the past,
when glaze mix was thinner I had bisqued to 03 so I glazed to a count of three. That batch of glaze had a firing that crawled and a firing that did not.
I did something right once. Not sure if it was due to the thinner glaze, or the amount of time I left the piece in the glaze or the bisque temp.
Preheated kiln for 7 hours to be sure bisqued/glazed pieces were dry. Slow glazed to cone 5, 15min hold cool normally.
Sorry to ramble but hoped I covered all info.Attached File  IMG_1300.jpg   29.89KB   41 downloads

La Paloma Texas Pottery, Juli Long

#2 neilestrick


    Neil Estrick

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Posted 14 February 2012 - 12:06 PM

I wouldn't call that crawling, either. Looks like some pinholing and crazing. Try firing up to cone 6 to fix the pinholing, and add some silica/flint in 3% increments until the crazing is gone.

Neil Estrick
Kiln Repair Tech
L&L Kilns Distributor
Owner, Neil Estrick Gallery, LLC


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