Vered's Plastilina Moulds
Sticking with the theme of concrete, today we’re chatting about how Vered Kaminski makes her moulds to pour concrete in. The way she does it is very clever.
Vered uses plastilina. Plastilina is an oil based clay, kind of like play dough. It never dries out, and can be reused multiple times, as long as you don’t get too much dirt in it. And it’s really, really affordable, especially when compared to other reusable mould making materials. I got a block of it at a local art store (in Israel) for 15.50 shekels, which is about £3.32.
Here, she’s making a mould of a rock. So she’s picked the rock she wants, and has taken a clump of plastilina to press the it into.
Now, she opens up the mould a little to get the rock out, and sets it on the table. It’s ready for the concrete!
She has a tip for us at this point:
If the pin is sinking in, toothpicks are great at holding
Do note that this method only makes 1-part moulds, which means that you will have one flat side of the piece you cast (where the pin is, in the image above). You will not get an object that has dimension / designs all around. One way around this is to make 2 moulds, cast them, and then glue the two pieces together.
Concrete is really difficult to work with once it has cured, so Vered makes holes, puts in the pin backs, adds chain, or whatever she wants to do with it while it is still drying. That way, there is no need for drilling or glueing or additional processes that can take away from the final outcome.
When it’s all dried, just peel off the plastilina, and it’s ready to be made into another mould. I’d say it’s one of those materials that’s always good to have in the workshop. And it’d probably work really well with resin as well!
Vered has given the thumbs up to share the information she shared with me during our studio visit + chat. For all posts inspired and influenced by Vered, enter "Vered Kaminski" in the search bar on the right.