The recipe I used for this project goes as follows:

1 part clay

2 parts manure

3 parts sand

4 parts paper pulp


A suggestion from Peggy to me is, anytime you are going to mix plaster its best to put the recipe in plain view. That way no one forgets and adds to much of something and not enough of another. I made this mistake once and it wasn't much fun.

Engineering 305 class mixing plaster, note the big chalk board with the recipe written out.