Mitzuuu89 Posted July 6, 2019 Report Share Posted July 6, 2019 My molds are round shaped, with a wall thickness of about 3-4 cm. it’s ok for smaller molds, but for large ones they’re quite heavy. i’ve noticed after slip casting that water builds a round layer of about 1-1.5cm what’s a recommended wall thickness for slip casting molds? Link to comment Share on other sites More sharing options...
Chilly Posted July 8, 2019 Report Share Posted July 8, 2019 I think most books I've read on the subject say 2 inches. Yes, as they get bigger they get heavier. Also as they get bigger, the water to plaster ratio increases, so the moulds need to be even thicker. Link to comment Share on other sites More sharing options...
Mitzuuu89 Posted July 8, 2019 Author Report Share Posted July 8, 2019 Just now, Chilly said: I think most books I've read on the subject say 2 inches. Yes, as they get bigger they get heavier. Also as they get bigger, the water to plaster ratio increases, so the moulds need to be even thicker. hmm that's interesting, I would expect the wall thickness to depend on the desired ceramic wall thickness, no matter the size of the mold Link to comment Share on other sites More sharing options...
Mark C. Posted July 9, 2019 Report Share Posted July 9, 2019 The bigger the form the thicker the walls need to be to absorb the water.so what size of the form are we talking about??? I used to slip thousands of 5 inch tall aroma therapy lamps the molds where about1.5 inches to 2 thick in all directions. Link to comment Share on other sites More sharing options...
Mitzuuu89 Posted July 9, 2019 Author Report Share Posted July 9, 2019 2 hours ago, Mark C. said: The bigger the form the thicker the walls need to be to absorb the water.so what size of the form are we talking about??? I used to slip thousands of 5 inch tall aroma therapy lamps the molds where about1.5 inches to 2 thick in all directions. Forms are about 18 cm x 14 cm. And the walls need to be 1cm width Link to comment Share on other sites More sharing options...
Chilly Posted July 11, 2019 Report Share Posted July 11, 2019 I've never cast anything that thick. My head says, the thicker the cast, the thicker the mould need to be, in order to absorb even more water from the slip. But, my head also says, will the water travel through that much "drying" slip? Link to comment Share on other sites More sharing options...
Terrance Posted August 5, 2019 Report Share Posted August 5, 2019 I have been told the best thickness for casting is one inch, all around. The mold dries faster when the thickness is one inch. 1.5 to two inches takes longer. When I use my silicon rubber bat maker I can go to 2 inches. Link to comment Share on other sites More sharing options...
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