sand cores

[the artfull-codger]

  cores.JPG (Size: 27.02 KB / Downloads: 117) A couple of cores for the last 2 fingerpost signs I'm making, the previous core was made with beach sand & John winters oil impregnated cereal binder dead easy mix 100/3 ad a bit of water ,mix then bake inthe oven@200*c this time I thought I'd make it with my own recipe.I've made them before when casting some brass gun stocks for a friend who made replica guns [30 odd yrs ago] it's 5ml boiled linseed oil,8 flat dessert spoons of sand,mixed up in a plaggy bag then 1/2 ounce of dextrin mixed with 20 ml water & add 1 flat teaspoon of bentonite[obtional] to give it a bit more green strength 'cos it's a bit fragile at this stage, then mold & bake in the oven @200*c for 11/2 -2 hrs till it darkens it's solid after that.