Professor Rebekah Bogard demonstrates how to slip cast with 3 different types of molds, explains the difference between casting slip and joinery slip, describes how the process works, and troubleshoots how to open and release work from difficult molds.
Part 1: How to Make a Two-Piece Plaster Mold for Slip Casting: https://www.youtube.com/watch?v=49xbrY8bAtM
Part 2: How to make a 2-Piece Plaster Mold for Slip-Casting: https://www.youtube.com/watch?v=Xg3pjR6MJhI
The Essential Guide to Mold Making & Slip Casting (A Lark Ceramics Book): https://www.amazon.com/Essential-Guide-Making-Casting-Ceramics/dp/1600590772/ref=sr_1_4?dchild=1&keywords=andrew+martin&qid=1596762479&s=books&sr=1-4
How to Make Casting Slip from Your Clay Body by Paul Andrew Wandless: https://ceramicartsnetwork.org/daily/ceramic-supplies/pottery-clay/how-to-make-casting-slip-clay-body/
Large Rubber Bands for Molds (they come in a variety of sizes): https://www.amazon.com/National-Artcraft-Natural-Rubber-Heavy-Duty/dp/B07W739HGM/ref=sr_1_1?dchild=1&keywords=ceramic+mold+rubber+bands&qid=1596762618&sr=8-1
BST4 Banding Straps for Plaster Molds : https://www.amazon.com/Creative-Hobbies-BST4-Banding-Applications/dp/B073X316FL/ref=sr_1_3?dchild=1&keywords=ceramic+mold+rubber+bands&qid=1596762686&sr=8-3