I thought it might be helpful to post a few more moldmaking pictures. In previous posts, I showed some of the rubber master molds. Those are used to make the plaster molds needed for slipcasting. They are “molds to make molds”. This time I will only need one mold, so I am skipping that step and making a plaster mold from the start.
What I want to do is take the tile that I have been working on in Chavant clay, and create a duplicate in greenware. My reason for doing this is two-fold. First I am not sure how I want to finish the piece, so multiple copies will give me the option to work on a number of variations before I settle on a favorite. The other reason is that I prefer working in the greenware during the detailing stage. There is something to be said for being able to smooth out rough spots with a damp brush!
So this is the tile, the first of a planned series on the seasons.
He was sculpted in Chavant clays on top of an old piece of shelving. I use a variety of clays to get the level of firmness I need. As you can see, sometimes that means more than one color of clay! He still needs work (and a mane!), but at this point the basic shapes are where I want them, and I’m ready to pour plaster.
He’s not suited to a simple mold, though. The outside edge of his muzzle creates an undercut. If I poured plaster over him now, when I tried to pull the tile I would end up ripping his nose off! So I need to make an inset piece that will come off first. For plaster moldmaking, though, what comes off first gets poured last. We need to fill that area with clay, then, so that a gap remains for the later piece.