![]() ![]() After the plaster has hardened–I generally wait 24 hours–you can tear the box away from the outside of the mold and remove the cup. Try to pour to the side of the box, rather than directly onto the cup.Ĥ. Mix up your plaster (any type should work), and after it is completely mixed, pour it into the box. I have not had problems with this happening, but better safe than sorry, right?ģ. Optional: You can cover the cup with vaseline or a silicone spray to make sure the plaster doesn’t stick to the cup. You can try this without the clay, but I’ve found that sometimes the cup will float to the top of the plaster and ruin the entire process. This will hold the cup in place as you set it upside down inside the container. ![]() Place a small layer of clay in the bottom of the box, flat and even. I like cardboard because it separates fairly easily from the outside of the plaster mold.Ģ. A shoebox, a half gallon of milk or juice, whatever. Get yourself a box into which you can pour the plaster. However, if you’re just experimenting or trying slip casting for the first time, you might even want to pick up a cheap cup from the dollar store. What I’m showing you here may not be the most technically clean or correct method, but it is what works in my classroom. Ideally, the cup would be one that the student has thrown on the wheel or even hand-built. I find a one-piece mold of a tapered cup is the easiest way to start. I’d like to share it with you today so you may be willing to jump in with your students as well. ![]() Through a lot of trial and error with my students, I’ve finally found a process that works in my classroom. Slip casting, for me, has always been one of the most difficult art-making processes to get right. ![]()
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