Ivoclar Vivadent IPS Empress Esthetic - Manual (Page 26)

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Position the IPS Empress Esthetic ingots and AlOx plungers on the IPS UniTray. Place the investment rings and IPS UniTray with AlOx plungers and ingots in the preheating
furnace.
Preheating
After the stipulated setting time of the respective investment material (IPS PressVEST or IPS Empress Esthetic Speed), the
investment ring is prepared for preheating as follows:
– Remove the ring gauge and ring base with a turning movement,
– Carefully push the investment ring out of the IPS Silicone Ring.
– Remove rough spots on the bottom surface of the investment ring with a plaster knife and 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 with the respective ingot shade.
Setting time
Temperature of the preheating
furnace
Preheating temperature
Position of the investment ring in
the furnace
IPS Empress Esthetic Ingots
IPS Empress Alox Plunger
Important
IPS PressVEST
min. 60 min.
Room temperature
850°C (1562 °F)
Towards the rear wall; tipped with the
opening facing down
Always preheat
Always preheat
IPS Empress Esthetic Speed
min. 30 min., max. 45 min.
850 °C (1562 °F); switch on
preheating furnace in time
850°C (1562 °F)
Towards the rear wall; tipped with the
opening facing down
Always preheat
Always preheat
If several Speed investments are
required, they should be invested with
a time difference and placed in the
preheating furnace at intervals of
approximately 20 minutes. When
placing the investment rings in the
preheating furnace, make sure that the
furnace temperature does not drop too
much. The indicated holding time starts
when the preheating temperature is
reached again.
In order to ensure smooth working procedures in the laboratory on a daily basis, impeccable functioning of the infra-
structure and the preheating furnaces is essential. This includes their maintenance, cleaning with a vacuum cleaner in a
cool state as well as regular checks of the temperature controls and heating elements, etc. by the manufacturer.