make sand for castings

[ruben]

hello

Good afternoons
I wanted to make casting mold sand that is like petrobond, red in color, and oil-bonded

a question (I don't know if it's a stupid question)
If I change the bentonite clay for natural red clay the color will change like the petrobond

thank you

 

[SmithDoor]

hello

Good afternoons
I wanted to make casting mold sand that is like petrobond, red in color, and oil-bonded

a question (I don't know if it's a stupid question)
If I change the bentonite clay for natural red clay the color will change like the petrobond

thank you

Petrobond changes color to black after a few uses.
The natural bond sand is very good sand and low cost easy to use. Small foundries like this one and schools.

Bentonite add to sand needs to be mulling. This can done by spreed in driveway and use car or building a muller.

Dave

 

[ruben]

But you'd know how to make a red casting mold sand that can be bonded with oil

and if I change the bentonite for red clay the color will change