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Uneven Thickness Clay - How To Prevent Cracks?


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So i would like to make a garden planter that looks like a pile of rocks -little rocks - succulents are growing out of. Kinda like voluntary plants growing out of a rocky rubbish heap.

 

It is going to be hand built with bmix with grog (using up my last clay leftover) glazed to ^5.

 

So i am going to have lots of uneven areas. Quarter inch to 3/4 inch thick. I'll poke holes in the very thick areas and apply wax to the thin areas.

 

I was going to cover with plastic for a week to slow dry it.

 

I want to avoid cracks at bisque or/and glaze fire. Is there anything else i should be considering?

 

I am still working on the design. Should the thicker area be made a day earlier?

 

Any thoughts would be most welcome.

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What size of planter are you contemplating . . . the overall, end-size?

 

Consider making a series of smaller rocks from pinch pots and then assemble. That would allow a more uniform wall. You could assemble at soft leatherhard with slip and coils or glue together after glaze firing with adhesive.

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