Free for  educational use, including in classrooms, as well as personal use.  Not for print or reproduction on instagram, twitter, facebook or other social media without permission.


This is a PDF document which contains convenient plaster mixing ratios, for use in your classroom or studio.


This reference chart is a fast guide for mixing US Gypsum / K-60 Pottery Plaster for use in mold making and slip casting.  I made it to help me make the process a bit faster as I am always spending time calculating how much to mix, and inevitably I also cannot find the correct container with labels, so this has amounts in quarts, ounces, grams, pounds, as well as volume units in cubic inches.  If you notice something incorrect or think of something that should be added please get to me on instagram (link below) @redneckpaycheck .  Thanks!