Part 2: How to make a 2-Piece Plaster Mold for Slip-Casting

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Published 2020-02-01

This video demonstrates how to properly measure and mix plaster using the volume method. It also demonstrates how to make a 2-piece plaster mold to use for slip-casting.

For Part 1: How to Create a Bed for Plaster visit: • Part 1: How to Make a Two-Piece Plast...

To mix plaster: combine 1 part cold water with 1.5 parts Number one pottery plaster. Always start with water first, and add plaster to the water. Always use cold water, unless you want to speed up the set time of plaster. Never use Plaster of Paris.

Sift the plaster in slowly as to not create large lumps of plaster. Allow to slake (soak) for 3-20 minutes. If you let it slake longer than 20 minutes, it will begin to set up and you won’t be able to work with it.

After slaking, stir plaster for 3 minutes to fully absorb the water
Pour plaster

Special thanks to my former MFA professor, Mark Burns, who taught me nearly everything I know about plaster molds and mold-making.

All Comments (21)

@tvsw_ 2 months ago

You are literally the best! Ha I wish you were my teacher! ❤️
@stephencraig7130 11 months ago

Number 1 Pottery Plaster!!! Wonderful!!
@rafaelubiles3 4 years ago

What a fantastic tutorial!! Thank you!
@sabrinabarilone5437 10 months ago

omg Becky! I just did a search on how to make a two part mold and your video was the first to pop up. Ha!
@anthonykulakusky9564 4 months ago

Wonderful commentary. Great job. Thank you.
@sarahhope7704 3 years ago

Brilliant tutorial thank you!
@000lumiere000 3 years ago

Wow! You've answered all my unanswered questions. Thanks for sharing!
@hanna.hulbert 4 years ago

Amazing! thank you so much! 🙏
@sarahkenworthy556 3 years ago

wow! exactly what I was looking for. Thank you for passing on your knowledge. I will definitely be following you. You are so detailed in every step it makes it inspiring to try it out!!
@kimberleesteele6652 3 years ago

Love this video & how you explained step by step. Makes learning a lot easier
@jessicawhalen4027 2 years ago

Thank you for all of your informational videos!
@micksmom2293 3 years ago

Thank you for posting this video. it was very thorough and I learned so much!
@CaptMike 2 years ago

I have made many molds, but you have tought me things I never thought about. Great video!
@somebody4578 3 years ago

Greatest teacher I discovered. Thank you so much for priceless informations you shared🥰❤️
@Momma_bee_katie 3 years ago

great video, great detail. Thank you for putting this together.
@nickbez67 4 years ago

Great work
@merfinandruthers 3 years ago

So many excellent tips! Thank you
@TheNadinucca 2 years ago

Thank you so much for you clear videos! I'm actually translating a course on slip casting and I had no idea how to translate the proper terminology from Spanish into English, but your videos solved all my doubts!
@Thechezbailey 2 years ago

This video is a perfect explanation!
@Gfors85 1 year ago

Thank you madame-awsome. great stuff!