How to Make a Two Part Plaster Mold at Home! Ceramic Orange Juice Jug! 

Thank you so much, Sara!!

That's what I thought before I started slip casting. It seems like no matter how much one knows about ceramics there's always something else and when she says it's not a hard science she really means it 😁

Aw thanks! I'm so glad, let me know how it goes!

Thank you, I'm glad you liked it!

thanks so much Tommy!

Oh thanks, Joseph! The music seems to be a bit of a marmite thing... some people can't stand it!

@@evastalinski. what is the music? And I love watching your video. It's very clear and helpful as well as entertaining, I'm glad it exists

Thank you so much! If you're talking about the thickness of the liquid plaster, I usually aim for a runny yoghurt consistency. As long as it's not too watery or very gloopy it should be fine.

Thanks Ana! That all depends on what type of glaze you use and how high you fire it. There's a lot of discussion online about what constitutes a truly 'food-safe' ceramic item and to be honest I'm not very knowledgeable on this subject, that's why I never claim to make food safe items. I know it is ideal when a jug like this is sintered, this prevents bacteria being able to grow in small crevices, which seems to be the most important thing along with a non toxic glaze.

Probably! You may need to wiggle/pry/force it a lil bit. It mostly depends on what kind of material the thing you molded is made of. Hope it comes out, good luck!

^^^^^

It’s just plaster of Paris or you can use a product called 100% Casting Plaster. The second solution she uses is slip. It is watered down clay with a few other chemicals in it.

Hi Anni! Molds can be tricky like that, my best advice would be to pry a dull knife (like a butterknife/one you don't mind ruining) in between your mold parts and wiggle it around and apply a bit of pressure. This will usually cause the seal to break, but if you're not careful you can also damage the mold. I would also say three days is probably a bit too long to leave the slip in your mold, depending on what your mold looks like of course. Speaking from my own experience I usually try to un-mold small pieces a few hours after casting them and wait a full 24 hours for larger pieces. Hope this helps, let me know how it goes if you end up trying it!

I'd suggest you to just buy slip clay. it's a liquid form of clay specifically for molding

@@rokarokoumije thanks! :)

Thanks! The boards are just regular MDF/particleboard, the cheapest kind they had at the hardware store, if I remember correctly. They've been holding up quite well over the past few years.

if you brush the plaster surface with dish soap, i guess it should be alright

You really have to be very careful doing this. The dish soap isn’t enough to keep it from sticking to the mold. I would use cooking spray and quite a bit of it. Use it to make a small piece first and see how it goes and then go on to something harder.

The brown mud looking stuff over ceramic clay. The brown water looking stiff is called slip and that is watered down clay with a few other chemicals in it that make the molded piece that comes out.

Hey Jana, thanks! I'm glad you found it helpful. I just soap the plaster since plaster sticks to itself which can make it hard to pry the two halves apart. I've always been able to pull the wood from the plaster easily without soap.

@@evastalinski. Thank you so much, that's really good to know!

im not op, but yes, the bottle is hollow when finished

that was hollow

Aw thanks, glad you liked it! It's a military march from the free RU-vid Music Library.

Just a little dish soap!

There is no mold release becasue the plaster mold just sucks the water out of the slip, which is what she made the ceramic jus from, the casting.

no, unfortunately household ovens cannot reach the temperatures kilns can that are necessary to properly preserve the clay

Yes!! It neeeds to dry thoroughly or the slip will stick to the walls and fall apart. It has to be very dry. Depending on where you live it may not take as long.

Hi@@micheledickey4066 , Do you know how thick the slip needs to be, what is the proportion of water vs clay?

thanks for letting me know, I will from now on!