lauras@epix.net on mon 25 mar 96
-------------------------------------
Name: Freedman
E-mail: lauras@epix.net
Date: 03/25/96
Time: 08:59:32
This message was sent by Chameleon
-------------------------------------
I am having trouble with porcelain handles. Going through bisque they
look all right but after a glaze firing I find little cracks where they
are attached to the vessel, pot, mug. What am I doing or not doing. Can
these pots be fixed and refired? TIA
Lauras@epix.net
Tim Lynch on mon 25 mar 96
I have had the same problem with my porcelain handles and decided to try
something I first read about here on CLAYART. After you join the handles
to the body and smooth things out, wax the joints. I tried it and all
the handles made it through bisque and glaze firings with no cracks.
Tim Lynch
carrie or peter jacobson on mon 6 dec 99
Hi Jim, First, I imagine you are scoring the mug and handle and using an
adequate amount of slip?
What I do with porcelain handles is attach them well, then wrap the
attachments in plastic, then wrap the mug in plastic. On the attachments, I
wind plastic around them four times minimum.
Have you tried paper clay for the handle, or paper-clay slip for the
attachment? Rip up a few squares of toilet paper, wet and drain it (don't
squeeze), mix with porcelain slip and/or recycle material (the stuff in the
bucket waiting there to be recycled). Use one part (bulk) wet paper to two
parts clay. Don't be anal about this, just look at it.
An extraordinarily talented ceramic artist (not at all a dirty word to me)
friend of mine who is an expert in paper clay says it does not like to be
wrapped so much.
Paper clay also can be used to patch cracks, breaks, etc. I have used it
effectively in this manner on porcelain handles.
Carrie
Carrie Jacobson
Pawcatuck, CT
mailto:jacobson@brainiac.com
Ron Roy on tue 7 dec 99
Hi Jim,
I work with porcelain and have found vinegar to be the answer for me.
Here is the drill: Use a brush and smear on some cider vinegar where you
want to attach the handles. Work it in a bit with your finger. Now put some
vinegar on the handles where you are going to attach them. I usually put
some on the outside of the handle as well - epecially if you are going to
bend them. Now a little more vinegar on the mug again and press the handle
on. No scoring - no slip.
I have not had a handle crack off since I started doing this.
RR
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
gari whelon on wed 8 dec 99
hi Ron
Your bud Liz Willoghby has a modification on this. She keeps a container
mixed with vinegar and slurry from each of the clays she works with. When
tie to attach handle, spout whatever, this is wat se uses ad it does work
like a charm, I've being trying this since her workshop in Nanaimo earlier
this year. Perhaps this has the added strength of using he same clay body
as a part of the superglue.
Gari Whelon
Proletariat Pots
Nanaimo B.C.
whelon@island.net
>From: Ron Roy
>Reply-To: Ceramic Arts Discussion List
>To: CLAYART@LSV.UKY.EDU
>Subject: Re: porcelain handles
>Date: Tue, 7 Dec 1999 09:19:15 EST
>
>----------------------------Original message----------------------------
>Hi Jim,
>
>I work with porcelain and have found vinegar to be the answer for me.
>
>Here is the drill: Use a brush and smear on some cider vinegar where you
>want to attach the handles. Work it in a bit with your finger. Now put some
>vinegar on the handles where you are going to attach them. I usually put
>some on the outside of the handle as well - epecially if you are going to
>bend them. Now a little more vinegar on the mug again and press the handle
>on. No scoring - no slip.
>
>I have not had a handle crack off since I started doing this.
>
>RR
>
>Ron Roy
>93 Pegasus Trail
>Scarborough
>Ontario, Canada
>M1G 3N8
>Evenings 416-439-2621
>Fax 416-438-7849
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Ron Roy on thu 9 dec 99
Hi Gari,
I try not to contradict Liz - in essence it is really the same thing -
vinegar and the clay you are using. If the slip is overdone there will be
some cracking in the excess slip because - the vinegar flocculates the clay
and it will shrink more.
Actually Liz is having server trouble so I can get away with this - my way
is better.
For Gods sake don't tell her I said that!
R
>----------------------------Original message----------------------------
>hi Ron
>
>Your bud Liz Willoghby has a modification on this. She keeps a container
>mixed with vinegar and slurry from each of the clays she works with. When
>tie to attach handle, spout whatever, this is wat se uses ad it does work
>like a charm, I've being trying this since her workshop in Nanaimo earlier
>this year. Perhaps this has the added strength of using he same clay body
>as a part of the superglue.
>
>Gari Whelon
>Proletariat Pots
>Nanaimo B.C.
>whelon@island.net
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
Jane Vernon on sun 12 dec 99
>----------------------------Original message----------------------------
> >Yikes, hope someone can help me with this problem. I'm throwing with
> >porcelain for the first time and am having a problem with mug handles
> >falling off during drying. I used the same technique that has worked well
> >with stoneware clay. But with the porcelain, the handles on 3 of 3 mugs fell
> >off. If I hold the dismembered handle up to the mug, it looks like the
> >handle was trying to straighten out during the drying. What I'm wondering is
> >if there something different about porcelain or if I should be looking for
> >something more basic in my technique.
> >
> >Jim West - handleless in Slippery Rock
I had this problem with a board of 10 out of 10 large porcelain mugs
this autumn. What I did was to scrape off any residue of the handle,
dunk the whole mug in a bucket of water and start again. Then, and I
think this was the reason for success second time round, I covered the
whole board in a sheet of plastic in order to slow down the drying
process. 10 out of 10 successful handles this time!
Jane
http://www.otbo.demon.co.uk
| |
|
