Preventing Pattern Cracking
Posted 25 June 2013 - 11:01 AM
Posted 25 June 2013 - 12:41 PM
I just made a bunch juicers and I am trying to figure out why they all got pattern cracking on them. It is like a multiple s shape at the cone of the form. I did dry them in the sun (which I have only recently begun doing with some things). Not sure if that is the culprit. I am wondering if this is an issue with how I am making the form. Any ideas?
Pictures would help. Air drying in the sun is not an advisable thing on new forms.
Simply retired teacher, not dead, living the dream. on and on and. . . . on. . . . http://picworkspottery.blogspot.com/
Posted 25 June 2013 - 06:43 PM
Here are the shots. The method I used was to throw them from the same bat and add the stripes and "spout" while on the wheel. I moved them to a board and set the board outside. At leather hard I trimmed them on a foam lined chuck and set them back outside to dry.
Posted 25 June 2013 - 06:52 PM
Kiln Repair Tech
Owner, Neil Estrick Gallery, LLC
Posted 28 June 2013 - 07:42 AM
Posted 28 June 2013 - 08:33 AM
Posted 28 June 2013 - 12:13 PM
In addition to drying them more slowly, try rolling a small ball of clay ind pressing it into the peak of the juicer from underneath. Blend it in with your finger and compress well. I do this to prevent cracks in this type of shape and it always works.
So simple - Yes! I just don't want to waste time on a trouble form, but that is a great idea. The cracking is right along the stress lines where the collaring was done so I think this will work nicely.
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