Jeff Gieringer on sat 18 jul 09
Linda,
One of the best books I have seen on the subject is by Andrew Martin.
Mine is at the studio, but I'm thinking the name of it is simply Mold
Making.
Jeff Gieringer
Berea, Kentucky
----- Original Message -----
From: "Linda Stauffer"
To:
Sent: Saturday, July 18, 2009 12:10 PM
Subject: Mold making and casting question
> I've made a beer stein for a local community celebration. I threw the
> basic shape, then sculpted things onto the surface. Is there a book
> that I can use to learn how to make a multiple part mold and make
> multiple castings. I know how to make silicone rubber molds for lost
> wax casting of bronze, but I know the mold has to be plaster, not
> silicone rubber.
> Linda
>
Snail Scott on sat 18 jul 09
On Jul 18, 2009, at 11:10 AM, Linda Stauffer wrote:
> Is there a book
> that I can use to learn how to make a multiple part mold and make
> multiple castings...
It's not that tough.
You need to avoid undercuts, so learning to
see those is your first task.
You will need enough sections that every part
of the mold will pull free without binding on
the sculpted ornament. Bisque-fire your mug
pattern to harden it, then draw your parting
lines (marking the sections of the mold) directly
onto the pattern. Work soap into the surface to
make it nonporous, Block off all of the pattern
except the one part you want to do first, using
clay walls, and apply plaster to that section.
Remove the clay after the plaster sets, tidy
up the contact surfaces between sections and
apply soap to the plaster. Wall off another
section next to that one and repeat until done.
If the relief is low, four sections may do it, or
three if the bottom is attached to a side section.
When you make your pattern, remember that
you will have three stages of shrinkage, not just
the usual two: patter wet-to-dry, casting wet-to
dry, AND casting dry to vitrified. It will end up
smaller than it would if merely firing an original
to vitrification directly, so work larger than you
might otherwise.
There's a bit more to making a really nice mold,
but the basics are pretty straightforward.
To answer your actual question, though:
I recommend Donald Frith's book, 'Mold Making
for Ceramics', which used to be prohibitively
expensive but is now available in a reasonably-
priced paperback.
-Snail
James Freeman on sat 18 jul 09
On Sat, Jul 18, 2009 at 12:10 PM, Linda Stauffer w=
rote:
> Is there a book
> that I can use to learn how to make a multiple part mold and make
> multiple castings.
>
Linda...
I learned what I know from two books, "The Essential Guide to Mold
Making and Slip Casting" by Andrew Martin, and "Mold Making for
Ceramics" by Donald Frith. Both are excellent. Martin's book is more
"down and dirty" in it's approach. It is very easy to understand, and
is aimed at the studio potter. Frith's book is much more "correct" in
it's approach. It is far more technical and more concerned with the
"right way", but seems aimed toward a more industrial type potter. If
you can, read them both. If you only have time for one, probably best
to start with Martin. Others may have different suggestions.
Also, there are two experts on clayart, Jeff Longtin and John Rodgers.
Better than any book, and both have generously answered questions for
me.
Good luck with the project.
...James
James Freeman
"All I say is by way of discourse, and nothing by way of advice. I
should not speak so boldly if it were my due to be believed."
-Michel de Montaigne
http://www.jamesfreemanstudio.com
http://www.flickr.com/photos/jamesfreemanstudio/
http://www.jamesfreemanstudio.com/clayart/
John Rodgers on sat 18 jul 09
Linda,
The definitive book on mold making is "Mold Making for Ceramics" by
Donald E. Frith. It's available through Axner's and others. If you have
this book, you won't ever need another.
Also, take at look at my website
http://www.moldhaus.com
There are examples of the process there.
If you have questions, feel free to ask.
Good luck,
John Rodgers
Chelsea, aL
Linda Stauffer wrote:
> I've made a beer stein for a local community celebration. I threw the
> basic shape, then sculpted things onto the surface. Is there a book
> that I can use to learn how to make a multiple part mold and make
> multiple castings. I know how to make silicone rubber molds for lost
> wax casting of bronze, but I know the mold has to be plaster, not
> silicone rubber.
> Linda
>
>
Ric Swenson on sun 19 jul 09
Linda,
Read Donald Frith's book....I believe the title is MOLDMAKING FOR CERAMICS.=
Inter-library loan, ebay or amazon.com will probably be good sources. You=
r local college library or art dept. might have a copy too.
Slip casting molds (moulds) are usually made from U.S. Pottery Plaster # 1 =
( I am sure there are comparable plasters for casting available under other=
trade brands worldwide.)
Happy potting.
Ric
Richard H. ("Ric") Swenson, Teacher,
Office of International Cooperation and Exchange of Jingdezhen Ceramic Inst=
itute,
TaoYang Road, Eastern Suburb, Jingdezhen City.
JiangXi Province, P.R. of China.
Postal code 333001.
Mobile/cellular phone : 86 13767818872
< RicSwenson0823@hotmail.com>
-------------------------------------------------------------
> Date: Sat, 18 Jul 2009 12:10:55 -0400
> From: claypotters@VERIZON.NET
> Subject: Mold making and casting question
> To: Clayart@LSV.CERAMICS.ORG
>
> I've made a beer stein for a local community celebration. I threw the
> basic shape, then sculpted things onto the surface. Is there a book
> that I can use to learn how to make a multiple part mold and make
> multiple castings. I know how to make silicone rubber molds for lost
> wax casting of bronze, but I know the mold has to be plaster, not
> silicone rubber.
> Linda
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Eleanora Eden on sun 19 jul 09
Hi Linda,
I read all the replies and I would only add to make sure that the #1 potter=
y
plaster you buy is fresh. Plaster that has been sitting around in a wareho=
use
can acquire moisture and that will make it lumpy and will put all your calc=
ulations
off.
You want to inquire of your supplier how long the bags have been there. Yo=
u
want to buy an un-opened bag. A #50 bag of plaster is not very expensive.
After you buy it, place the bag in a plastic garbage bag so it doesn't acqu=
ire
moisture at your studio. Carefully stored, the plaster will last a good lo=
ng time.
Good luck with it. I have many posts in the archives about my plaster-maki=
ng
procedure which is by volume rather than by weight. Much easier. Always
works great.
Eleanora
>I've made a beer stein for a local community celebration. I threw the
>basic shape, then sculpted things onto the surface. Is there a book
>that I can use to learn how to make a multiple part mold and make
>multiple castings. I know how to make silicone rubber molds for lost
>wax casting of bronze, but I know the mold has to be plaster, not
>silicone rubber.
>Linda
--
Bellows Falls Vermont
www.eleanoraeden.com
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