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Hello! Could anybody recommend or point me to the recipe of basic oil based clay? Please! I know that's a weird question with a lot of "why would you do that". I'm currently using plasticine – oil based clay for my master models, and then make slipcasting forms out of them. I use hardest type of it, available at the art/hobby shops. It is usually grey or terracota-red, but this doesn't matter, just to understand what am talking about. My current guess is to use dried earthenware or stoneware powder, add some wax or parafinn and some oil (like cooking oil, or motor oil – i think i need some type of non-dryeing oil). Why do i need this? 1) I want to control the ingredients, so i can make harder or softer oil-based clay. Currently i can only heat up or cool the clay from the hobby-shop to change it's plasticity. 2) I need a huge batch of plasticine (like 100kg) and i have almost infinite supply of regular water-based clay. 3) Why wouldn't i use regular water clay if i have so much of it? I need something, that does not dry/shrink/crack and can be reused. That's the idea Thx!