Making Plastic Objects at Home

After a seeing a comment about some rather tough Jarlsberg cheese on Facebook, I was reminded that milk was once used to make a kind of plastic - casein plastic was used for buttons and other small items. Manufacture of this material is possible at home. I turned to my copy of "Chemistry Experiments at Home for Boys and Girls" - a 1949 book by H.L.Heys M.A. (Cantab). Such publications as this would not be encouraged nowadays, but in 1949 making plastic objects in the kitchen was aparently well within the abilities of school boys and girls.  Here is the recipe...

73 Hugh