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double slipping for single firers

updated wed 3 jan 01

 

Martin Howard on sat 30 dec 00


see my posting on handles.

This is an allied question, especially for once firers.

Have you had problems with slipping both inside and outside at leather
stage?

If so, have pots cracked only at the top of handle join?

Despite my ideas about vinegar in the handle posting, it might just be that
the two kinds of slip I have used, one specially designed for the body, the
other a thixotropic white slip (because my supplier had run out of the first
one), are causing differential stresses and the part which is most stressed
is the top handle join.

Any experience on this would be appreciated.

Martin Howard
Webb's Cottage Pottery
Woolpits Road, Great Saling
BRAINTREE, Essex CM7 5DZ
England
martin@webbscottage.co.uk

Steve Mills on mon 1 jan 01


Martin, I slip the inside, let the pots dry to leather again, then slip
the outside. I get fewer casualties that way.

Steve
Bath
UK


In message , Martin Howard writes
>see my posting on handles.
>
>This is an allied question, especially for once firers.
>
>Have you had problems with slipping both inside and outside at leather
>stage?
>
>If so, have pots cracked only at the top of handle join?
>
>Despite my ideas about vinegar in the handle posting, it might just be that
>the two kinds of slip I have used, one specially designed for the body, the
>other a thixotropic white slip (because my supplier had run out of the first
>one), are causing differential stresses and the part which is most stressed
>is the top handle join.
>
>Any experience on this would be appreciated.
>
>Martin Howard
>Webb's Cottage Pottery
>Woolpits Road, Great Saling
>BRAINTREE, Essex CM7 5DZ
>England
>martin@webbscottage.co.uk

--
Steve Mills
Bath
UK

Paul Taylor on tue 2 jan 01


Dear Martin

Do the outside first

If you do the inside first the handle dries and the pot does not .

If you glaze the out side first and let the pot dry a bit the handle is
still wet enough not to crack when you do the inside say the next day. Of
course you have to be careful with the glazed pot - but a raw glaze has
enough clay in it to stand a little rough treatment.

Doing this even works for bone dry pots. if you leave the inside glazing
till the pot is again dry the pot does not get blisters or pull itself
apart.



Regards from Paul Taylor
http://www.anu.ie/westportpottery

>> see my posting on handles.
>>
>> This is an allied question, especially for once firers.
>>
>> Have you had problems with slipping both inside and outside at leather
>> stage?
>>
>> If so, have pots cracked only at the top of handle join?
>>
>> Despite my ideas about vinegar in the handle posting, it might just be that
>> the two kinds of slip I have used, one specially designed for the body, the
>> other a thixotropic white slip (because my supplier had run out of the first
>> one), are causing differential stresses and the part which is most stressed
>> is the top handle join.
>>
>> Any experience on this would be appreciated.
>>
>> Martin Howard
>> Webb's Cottage Pottery
>> Woolpits Road, Great Saling
>> BRAINTREE, Essex CM7 5DZ
>> England
>> martin@webbscottage.co.uk
>
> --