[Clayart] Porcelain slip on platters cracking

Cyndy Shorter via Clayart clayart at lists.clayartworld.com
Sun Jul 26 22:06:54 EDT 2015


I will definitely work on it.
On Jul 26, 2015 10:04 PM, "David Hendley via Clayart" <
clayart at lists.clayartworld.com> wrote:

> I concur Cyndy. You need to deflocculate the slip to keep it
> from cracking.
> What deflocculation does is allow you to make a thicker
> slip with less water that will still flow easily when you apply it.
> Less water means less shrinkage on drying, hence no
> cracking!
> David Hendley
> david at farmpots.com
> http://www.farmpots.com
>
>
> ----- Original Message -----
>
>> Hi Cyndy,
>>
>> I used to decorate platter with slip made from the same clay. I let  the
>> platters dry to about trimming hardness then slip trail - allow to  dry for
>> a day and then
>> trim. I found I had to deflocculate the slip or the slip would crack.
>>
>> I can send you instructions on how I deflocced the slip.
>>
>> RR
>>
>> Quoting Cyndy Shorter via Clayart <clayart at lists.clayartworld.com>:
>>
>>  Hey all! I am attempting to slip decorate large platters. I use the
>>> trimmings from my porcelain to make slip. So I am staying in the same
>>> clay
>>> body. Vases, pitchers, and anything else vertical, no issues. But large
>>> platters are getting frustrating. I wrap in plastic and dry as slow as
>>> possible, but still get cracks. I slip immediately following throwing,
>>> so I
>>> am reasonably close in moisture content. Does anyone have a suggestion?
>>> The
>>> clay itself does not usually crack unless I attempt to dry too fast.
>>> MAILMAN_MIMEDEFANG WRAP
>>>
>>
> MAILMAN_MIMEDEFANG WRAP
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