[Clayart] Hole in the bottom of a bowl on a potter's wheel

[Terry Lazaroff]

This could also be a wedding difficulty.  Does it happen often?

Terry

Sent from my iPad

> On May 19, 2018, at 6:50 PM, Vlasova Tatiana <yanatt at gmail.com> wrote:
> 
> Thank you, William
> Usually I throw clay on a wheel in the cone with a round bottom, and I
> press (lower) it from above, but not along the edges below.
> I'll see to it that I press it down near the wheel.
> Thank you!
> 
> I centering pieces more than 3kg so slowly and long time, and instead of
> water I use a slip for wetting. Can a slip or a long centering create a
> problem with a bubble in the bottom?
> 
> 2018-05-19 13:06 GMT+03:00 <wschran at twc.com>:
> 
>> This may have been from when the clay was attached to the wheel head or
>> bat.
>> The shape of the bottom of the clay may have had a small depression or
>> void from wedging.
>> Have the bottom of the clay that will be attached to wheel head curved to
>> avoid this.
>> 
>> bill
>> 
>> William Schran
>> wschran at twc.com
>> 703-505-1617
>> 
>> ---- Vlasova Tatiana <yanatt at gmail.com> wrote:
>>> Hello! Can I ask for advice for novice potter?
>> I make a bowl 28-30 cm, and when I remove it from the wheel, there are no
>> air bubbles, there is no hole at the bottom. But when the bowl dries, the
>> hole forms from the outside downwards in the center. Where the bottom
>> touched the wheel. Not cross-cutting
>> As if the clay in this place was more wet and sat down more.
>> When I cut the bottom, I removed this hole. But I do not understand why
>> this is happening?
>> 
>> many thanks
>> Tanya
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