Oops. Should have included that.
Quote:
Originally Posted by
josef1
What material are you using for the model ?
I'm using Phrozen Wax Like Violet.
The model is just a plain 3 mm band ring.
Flask is 3 1/2 x 4 inches
Schedule is -
From room temp quickly up to 148 C (298 F). Hold 1.5 hours.
Ramp over 1.5 hours up to 371 C (700 F). Hold 1.5 hours.
Ramp over 2 hours up to 732 C (1350 F). Hold 2 hours.
Ramp down at 300 C (572 F) to casting temp 500 C (932 F). Hold 1 hour before casting.
EDIT: Something else I should say is that the furnace was at 1030 C (1886 F) which is a fair bit above the melting point of sterling. I understand this is about 890 C (1634 F).
I also added a pinch of borax and stirred just before casting. I waited a couple of minutes after the stir.
The vacuum was at max before the pour.
https://rocketroseart.com/wp-content...2/08/Cast1.jpg
https://rocketroseart.com/wp-content...2/08/Cast3.jpg