I am trying to cast this little pendant in 9ct. yellow yellow gold using a delft casting system Attachment 12896 however when poured it comes out like this Attachment 12897, I think I have plenty of space to let the air out and the same model has worked in silver and pewter, I think I'm getting enough heat out of my oxyacetalene torch but im very new to this so any tips appreciated!
TIA
The Bodger