Ivoclar Vivadent IPS e.max ZirPress - Manual (Page 25)

25
Preheating
After the stipulated setting time of the respective investment material (IPS PressVEST or IPS PressVEST Speed), the
investment ring is prepared for preheating as follows:
– Remove the ring gauge with a turning movement.
– Carefully push the investment ring out of the IPS Silicone Ring.
– Remove the ring base with a turning movement.
– Remove rough spots on the bottom surface of the investment ring with a plaster knife. Check the 90° angle. Investment
material residue must not enter the sprues. Blow into the sprues if necessary.
– If several investment rings are preheated together, mark them accordingly.
Setting time
Temperature of the preheating
furnace when placing the invest-
ment ring
Position of the investment ring in
the preheating furnace
IPS e.max ZirPress ingots
IPS Alox Plunger or
IPS One-Way Plunger 300 g
Note
IPS PressVEST
min. 1 hour, max. 24 hours
Room temperature max. heating
rate 5 °C/9°F/min. to 850°C/1562 °F
towards the rear wall, tipped with the
opening facing down
no preheating
no preheating
IPS PressVEST Speed
min. 30 min., max. 45 min.
850 °C (1562 °F)
towards the rear wall, tipped with the
opening facing down
no preheating
no preheating
If several Speed investments are to be
conducted, they should be invested
consecutively and placed into the
preheating furnace at an interval of
approximately 20 minutes. Make sure
that the furnace temperature does not
drop too much when placing the
investment rings into the preheating
furnace. The stipulated holding time
counts from the point when the pre-
heating temperature has been reached
again.
towards the rear wall, tipped with the opening facing down Do not preheat the ZirPress ingot and Alox plunger.
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