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Balloons As Sphere Molds


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#41 Rae Reich

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Posted 21 June 2015 - 02:28 AM

I am going to try a combination idea ... The dodge ball as a mold but after building a somewhat thick clay surface, use sodium silicate on the surface and inflate the dodge ball to get the crackling effect .,, then deflate for safe drying. It should work with a forgiving clay body.


Nice! Like ribbing out a slip-coated wheel thrown pot.

#42 Rae Reich

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Posted 21 June 2015 - 02:58 AM

WD 40 although it stinks.

What do you mean it stinks? I use it as an deodorant and aftershave! WD 40 has saved me marriage 6 times and helped me sell 9 used cars.
it is a petrol chemical and is discouraged for use in the classroom.
Marcia
I read an article about making bisqued porcelain press molds where the potter preferred WD40 for release of the clay from the non-porous master. She went outside to spray. Then she discovered WD40 (and analogs) also comes in liquid form. She still brushed it on outside, but without the aerosol dispersal. With a ketchup-type squeeze bottle to dispense it, exposure could be kept to a minimum.
It should still be discouraged in classroom situations.

#43 oldlady

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Posted 21 June 2015 - 10:38 AM

i use the  wd-40 liquid all the time.  ketchup bottle, into a metal altoids box lined with a sponge.  dip metal stamps into sponge, press into clay. close box.  ketchup bottle squirt onto glass form, spread with sponge brush kept in a different closed box, rolled clay slab draped into glass form.

 

nothing sticks, no aerosol spray, ever.


"putting you down does not raise me up."

#44 Rae Reich

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Posted 21 June 2015 - 01:01 PM

Genius! All the "yeahbuts" covered! Was that your article? Or did you read it too?
And (back to topic) could be sponged onto balloons, too.

I had a friend who dipped balloons into slip. Don't know of she used release, she sure could've used Chris' under inflation tip because she had a high attrition rate from cracking before they were firm enough to stand alone.

#45 Chris Campbell

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Posted 21 June 2015 - 01:54 PM

Yes, experience always arrives right after you need it. : - )

Chris Campbell
Contemporary Fine Colored Porcelain
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TRY ...   FAIL ...  LEARN ...  REPEAT





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