Sam, we hold a ‘fun casting’ workshop each year at our school so
students can learn ‘other’ properties of metals. Broom casting, bean
casting, salt casting and splash casting are all attempted. The two
most popular are broom (straw) and salt.
There are two ‘secrets’ to broom casting. One is…don’t attempt to
do too much metal at once. Keep it light.
The second is in the wrist. Do not hesitate in one position but
rather sweep your ladle across the surface of the straw being sure to
pour a thin stream of metal the whole time. I teach students to flick
their wrist upward at the end of the sweep just as the metal runs
out. We get excellent strings.
You should also experiment a bit with the tightness of the straw.
Too tight and the metal will blob up, too loose and it will drop to
Cheers from Don in SOFL.