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

[Vince Pitelka]

A wedding difficulty?  The day after the Royal Marriage?  Perhaps.  Somehow
I doubt that Meghan and Harry had any wedding difficulties.
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka at dtccom.net  
sites.tntech.edu/wpitelka/

-----Original Message-----
From: Clayart [mailto:clayart-bounces at lists.clayartworld.com] On Behalf Of
Terry Lazaroff
Sent: Saturday, May 19, 2018 10:16 PM
To: Clayart international pottery discussion forum
<clayart at lists.clayartworld.com>
Subject: Re: [Clayart] Hole in the bottom of a bowl on a potter's wheel

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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