Table I

Schedule of Investment, Burn-out, and Devestment Conditions for Four Investment Materials
Wirovest Astro-Vest Platincast “J” Formula
INVESTMENT 36 ml Bego ‘BegoSol’ + water:powder (84 ml:800 g) water:powder (218 ml:750 g) water:powder (250 ml:750 g) binder soln:powder (210 ml:700 g)
mix, vacuum mix, vacuum mix, vacuum mix, vacuum
pour, vacuum pour, vacuum pour, vacuum pour, vacuum
bench set 2 h bench set 2 h bench set 2 h bench set 2 h
remove base remove base remove base retain paper base
BURN-OUT ramp 250°C, 1 h ramp 30°C, 0.5 h ramp 30°C, 0.5 h ramp 30°C, 0.5 h
hold 250°C, 1 h hold 30°C, 2 h hold 30°C, 3 h hold 30°C, 1 h
ramp 570°C, 1 h ramp 150°C, 2 h ramp 150°C, 2 h ramp 90°C, 1 h
hold 570°C, 1 h hold 150°C, 4 h hold 150°C, 2 h hold 90°C, 1 h
ramp 950°C, 1 h ramp 870°C, 6 h ramp 450°C, 2 h ramp 180°C, 0.5 h
hold 950°C, 1h hold 870°C, 3 h hold 450°C, 2 h hold 180°C, 1 h
ramp 900°C, 2 h ramp 870°C, 2.5 h
hold 900°C, 2 h hold 870°C, 1 h
DEVESTMENT air cool water quench water quench water quench
manual clean manual clean manual clean clean with Romanoff “J” Break, platinum investment remover