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Porcelain Slip

Porcelain Slip Making molds

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#1 Carson



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Posted 04 September 2013 - 11:52 AM

I'm back after I long hiatus!  Pottery, I've missed you so.  After careful consideration of my physical abilities I chosen slip casting molds as a start.  I have made molds in the past and am now brushing up on the steps.  I want to start with porcelain slip casting; however, I cannot seem to put my fingers on a supply of porcelain slip here in Palm Springs California.  I looked at one recipe online to make porcelain slip myself and would like guidance on a good recipe for porcelain slip.  Is it hard to make?  If so, maybe someone could point me in a direction to buy porcelain slip here in the Palm Springs area.  I am setting up the studio now and I look forward to getting started.  Thanks in advance.

#2 PeterH


    interested observer

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Posted 05 September 2013 - 08:24 AM



You mention buying  ready-made porcelain slip or mixing your own. A third option is buying a premix powder (which includes deflocculant).

I find it convenient to store and use, and it minimises transport difficulties. As I'm in the UK I cannot offer any advice on brand or supplier.


Regards, Peter


PS You might find this book on mould making of interest.


...mainly for its discussion of the plaster build up method. [Which - for a two-part mould with a flat seam - replaces the clay build-up by

casting a plaster build-up. So an extra plaster casting step replaces the construction of a clay build-up. You place the cottle on top of

the plaster build-up, rather than round the clay build-up.


It's only $5 second-hand, so might be worth buying blind.



This needs a picture, but the scanner is fighting the low-res half-tone image in the book:


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#3 neilestrick


    Neil Estrick

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Posted 05 September 2013 - 09:09 PM

Basic cone 10 porcelain is:

50% Grolleg

25% Feldspar

25% Silica

The Laguna web site has good slip mixing instructions.

Neil Estrick
Kiln Repair Tech
L&L Kilns Distributor
Owner, Neil Estrick Gallery, LLC


#4 Carson



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Posted 06 September 2013 - 08:01 AM

Thank you both for your input and assistance.  Will post more as the work progresses. 

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