[MarBon]

I need to know how to make ceramic molds. I have an idea for a mold that I would like to make but I need to know the steps on how to do. Thanks MarBon :) ;)

[creahands]

Hi MarBon
the basic mold is fairly simple.

the first step is to fined the exact center of the object and draw a line all the way around.the line has to meet.

2nd step is to build box to receive the wet plaster. The size of the box will depend on how large the object is. The box must be deep enough to cover the object and have the same amount of plaster top and bottom.

3rd step=mix enough molding plaster to fill about 3/8 of box. Coat object with liquid soap and put into plaster up to center line. At 4 locations against to wall of the box remove a small amount of plaster.these will be the keys for second half of mold.

Let dry for 2 days. Coat object and plaster with liquid soap and fill the box with plaster.

after 1 day remove mold from box and object from mold. Put mold back together and let cure for 1 week before using.

My advice is to find a mold company in your area and let them make it for you. Less mess and if need be they will be able to duplicate the object a lot faster.

if the object has more than one center line it will have to be disected and made in more than one mold and the pieces put together after casting.

hope this helps
Good luck
Chuck

[myrdynn]

What an idiot. I'm a retired model/mold maker, Creahands answer isn't even close, the only thing this will accomplish is permanently embedding the original in plaster. The answer is much more complicated than that. Depending on the shape and contours there may need to be multiple sections made, and most of the time making the mold may very well destroy the original. You need to know how to properly find parting lines, properly set up draft, clay in any potential "die-lock" situations. It's easier to show/teach someone how than to explain it, plus you need to use #1 Pottery Plaster. Plaster of Paris may give you one cast.

[myrdynn]

What an idiot. I'm a retired model/mold maker, Creahands answer isn't even close, the only thing this will accomplish is permanently embedding the original in plaster. The answer is much more complicated than that. Depending on the shape and contours there may need to be multiple sections made, and most of the time making the mold may very well destroy the original. You need to know how to properly find parting lines, properly set up draft, clay in any potential "die-lock" situations. It's easier to show/teach someone how than to explain it, plus you need to use #1 Pottery Plaster. Plaster of Paris may give you one cast.

[Just Dahlia]

What an idiot. I'm a retired model/mold maker, Creahands answer isn't even close, the only thing this will accomplish is permanently embedding the original in plaster. The answer is much more complicated than that. depending on the shape and contours there may need to be multiple sections made, and most of the time making the mold may very well destroy the original. You need to know how to properly find parting lines, properly set up draft, clay in any potential "die-lock" situations. It's easier to show/teach someone how than to explain it, plus you need to use #1 Pottery Plaster. Plaster of Paris may give you one cast.

That was a little harsh:rolleyes:
Don't you think?

[creahands]

Hi myrdynn

I wish to thank u for your comments. If u read what u wrote and what I wrote they are basically the same. The responds u gave was uncalled for. Hope I can do the same for u some day.

The info I posted was from a mold maker and molds that lasted longer then commercial molds because of hardness.

Nice to have u aboard

Chuck