Changed my mind about using a wet rag to cool a mold

I was in a rush on a small bronze pour last week and hit the sand mold with a damp cloth to speed things up, which I've seen old timers do. It cracked the mold face and ruined the piece, so I guess that 'trick' only works on certain mixes. Anyone know the exact sand-to-water ratio where this stops being a good idea?

2 comments

2 Comments

cooper.reese4d agoMost Upvoted

What kind of sand mix were you using?

river_fox184d ago

That 60/40 sand to cement ratio you mentioned, @cooper.reese, did you find it held up well or was it too brittle?